If you have purchased a print title that contains an access token, please see the token for information about how to register your code. All Rights Reserved. These compounds are known false positives for cocaine. 1. precipitates). But cobalt thiocyanate also turns blue when it is exposed to more than 80 other compounds, including methadone, certain acne medications and several common household cleaners. Mikrochimica Acta 1983 , 80 … Acidified Cobalt Thiocyanate (Scott's) (500 mL): Reagent #1: Add 3.5 grams of cobalt thiocyanate to 175 mL of deionized (DI) water (2% solution). To use all functions of this page, please activate cookies in your browser. During investigation of the mechanism and specificity of the Scott's (cobalt(II) thiocyanate) test for cocaine, it was discovered that the ambient temperature affected the equilibrium between the pink (negative) and the blue (positive) test results. Cobalt(II) thiocyanate is an inorganic compound of cobalt. Linear Formula Co(SCN) 2. The Scott test involves three steps. There are three common variations of the test. Structure and … Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE. You have access to this article. Using only 2% cobalt (II) thiocyanate, 5% stannous chloride and Sanchez reagent (5% furfural in a 5% acetic acid solution), determine how you would distinguish between the following drugs: cocaine HCl, tetracaine HCl, procaine HCl, benzocaine. The new test is a modification of the standard cobalt thiocyanate (CoSCN) test for cocaine. Cobalt thiocyanate is used to test for cocaine. Like all our NARK narcotic field tests, the Cobalt-Thiocyanate Reagent is meant for presumptive field drug testing. Give at least two examples of drugs that fluoresce under UV light. The test has been responsible for widespread false positives and false convictions. Categories: Analytical chemistry | Chemical tests. Preparation. Addition of the cobalt thiocyanate reagent to cocaine hydrochloride results in the surface of the particles turning a bright blue (faint blue for cocaine base). Abstract. 6799AF. NACRES NA.23 Adding the final reagent, chloroform, will cause two layers to form in the test tube, the aqueous layer (the water-based solution), and the chloroform layer. 3 Co (s) + 4 O 2 (g) 2 Co 3 O 4 (s) 2 Co (s) + O 2 (g) 2 CoO (s) Cobalt does not react directly with nitrogen, N 2. The author describes the reagent preparation. The solution changes back to pink upon adding one or two drops of hydrochloric acid and mixing. The modified version of the Cobalt Thiocyanate is a more specific field test for Cocaine and will distinguish between Cocaine HCl and Cocaine Base. Type of Test: Chemicals: What the Results Mean: Marquis Color: Formaldehyde and concentrated sulfuric acid : Heroin, morphine and most opium-based drugs will turn the solution purple. If cocaine is present, addition of the first reagent will cause the blue precipitate to form and the addition of the second will cause the blue to turn to a clear pink colour. It is best known for the cobalt thiocyanate test (or Scott test), which is a screening test for the presence of cocaine. MDL number MFCD00010937. Calculate the number of standard drinks in the subjects system when the test was given. Step 1: addition of cobalt thiocyanate, in the presence of cocaine, will form blue crystals (i.e. Under the terms of the licence agreement, an individual user may print out a PDF of a single entry from a reference work in OR for personal use (for details see Privacy Policy and Legal Notice). Cobalt(II) thiocyanate. New spot test for cobalt detection. The cobalt thiocyanate test (or Scott test) is a proven screening test for the presence of cocaine. Cocaine HCl will develop a Blue solution in the 1st ampoule as well as a sticky Blue residue adhering to the inside of the tube. Cocaine HCl will develop a Blue solution in the 1st ampoule as well as a sticky Blue residue adhering to the inside of the tube. Most of them are based on complexation of the alkaloid with cobalt(II) thiocyanate (Co(SCN) 2 (H 2 O) 4) … In the first, the reagent is prepared by dissolving cobalt thiocyanate (CoSCN) in distilled water, sometimes with additional ingredients such as ammonium thiocyanate or glycerine. The Sirchie NARK Modified Cobalt-Thiocyanate Reagent is a more specific field test for Cocaine and will distinguish between Cocaine HCl and Cocaine Base. Cobalt(II) thiocyanate, 96%. Cobalt does not react readily with air. There are three common variations of the test. HCl was added followed by the addition of two drops of Cobalt thiocyanate reagent whereas in the sample tube, a pinch of test powder was placed in sample tube and added one … 10 tests/box. Preparation of Spot Test Reagents Marquis (210 mL): Add 10 mL of 40% formaldehyde solution to 200 mL of concentrated sulfuric acid. Thiocyanic acid, cobaltsalt (8CI,9CI) Cobalt(II) thiocyanate, 99.9% trace metals basis EC Number 221-156-8. cobalt thiocyanate test (Ruybal test) A *presumptive test used principally for cocaine, although the reagent will react with other drugs. Hexamethylphosphoramide (HMPA) as a colour-enhancing agent for the thiocyanate cobalt complex. CTK4C2061. PubChem Substance ID … Cobalt(II) thiocyanate is an inorganic compound with the formula Co(SCN) 2 (H 2 O) 3.It is a coordination complex that is used in the cobalt thiocyanate test (or Scott test) for detecting cocaine.The test has been responsible for widespread false positives and false convictions. The subject has a body weight of 150 pounds. Alkali-thiocyanate is a sensitive reagent for the detection of cobalt in presence of 40 to 50% acetone. Please subscribe or login to access full text content. The reagent will form an insoluble ion pair in the presence of cocaine which precipitates out as a silvery turquoise blue solid. The test has been responsible for widespread false positives and false convi Cobalt(II) thiocyanate is an inorganic compound with the formula Co(SCN) 2. Other tests use three tubes, which the officer can break in a specific order to rule out everything but the drug in question — but if … Step 2: addition of hydrochloric acid, in the presence of cocaine, the blue crystals … NOTE: ALL TEST RESULTS MUST BE CONFIRMED BY AN APPROVED … Molecular Weight 175.10 . In this present work, the capability and structure determination of a cobalt thiocyanate complex—stabilized by glycerol —which detects cocaine (acid and base) in samples without interfering with cutting substances are studied by a TLC method. The 2nd ampoule will remain Blue. Cobalt Thiocyanate Reagent, Scott's test Cobalt thiocyanate in aqueous solution and stannous chloride in aqueous solution. Thiocyanate (also known as rhodanide) is the anion [SCN] −.It is the conjugate base of thiocyanic acid.Common derivatives include the colourless salts potassium thiocyanate and sodium thiocyanate. Cobalt(II) thiocyanate 96% Synonym: Bis(thiocyanic acid)cobalt(II) salt, Cobaltous thiocyanate, Isothiocyanic acid cobalt(II) salt CAS Number 3017-60-5. For Sale to Law Enforcement Only! It still began with cobalt thiocyanate. Cobalt(II) thiocyanate is an inorganic compound with the formula Co(SCN)2. Diphenhydramine and lidocaine also give blue organic layers. When this is added to cocaine powder, a blue solid (blue precipitate) is formed. Ten drops of chloroform (or similar solvent) are then added, and the tube is vortexed, then allowed to settle and separate into two layers. Amphetamines will turn it orange-brown. Public users are able to search the site and view the abstracts and keywords for each book and chapter without a subscription. A *presumptive test used principally for cocaine, although the reagent will react with other drugs. With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter. For questions on access or troubleshooting, please check our FAQs, and if you can''t find the answer there, please contact us. Taking cobalt as a first row transition metal , and with the hard-soft acid-base theory which indicates that the cobalt forms hard acid bonds with the nitrogen which is a hard base , the variation of the thiocyanate precursor material’s ligand on final complexes has been evaluated. Upon heating the oxide Co 3 O 4 is formed, and if the reaction is carried out above 900°C, the result is cobalt(II) oxide, CoO. PubChem Substance ID 24852801. A standard drink in defined as a 12 ounce beer, 4-6 ounces of table wine, or 1 ounce of hard liquor (~100 proof). The final color of the chloroform (organic) layer is recorded. C2CoN2S2. Cobalt thiocyanate: Cobalt thiocyanate, distilled water, glycerin, hydrochloric acid, chloroform : … In the first step, cobalt thiocyanate is added and blue precipitates appear. A blue reaction signaled the suspect drugs might be cocaine. Your browser does not support JavaScript. With color spot tests, a portion of an unknown powder/residue/crushed tablet is combined with a chemical reagent which may produce a color change. Summary: The Scott test is a popular field test for field identification of cocaine and crack. Cobaltous thiocyanate | C2CoN2S2 | CID 18174 - structure, chemical names, physical and chemical properties, classification, patents, … The color change is a presumptive indication of what the unknown could be. You could not be signed in, please check and try again. Mercury(II) thiocyanate was formerly … Cobalt thiocyanate. The test is a modification of the cobalt thiocyanate test currently used for cocaine and involves basifying samples rather than acidifying them. A procedure has been developed for the application of the reaction as a micro-and macro test for cobalt. EC Number 221-156-8. The reagent will form an insoluble ion pair in the presence of cocaine which precipitates out as a silvery turquoise blue solid. The test consists of three steps, each involving the addition of a certain reagent and observation of the color that develops as a result. J Appl Pharm 10: 265. doi: 10.4172/1920-4159.1000265 Page 3 of 8 oe e 3 265 Pa a oe ae oa 245 Conc. Find out more about the company LUMITOS and our team. Molecular Weight 175.10 . The cobalt thiocyanate test is performed by placing approximately 2 to 4 milligrams of a target substance in a glass test tube, then 5 drops of cobalt thiocyanate reagent. To increase the specificity of the test, a variation called the Scott or Ruybal test has been used in which three reagents are employed. After shaking, 1 or 2 drops of concentrated hydrochloric acid (other acids can be used[1]) are added, and the tube is again shaken. Cupric copper gives a sensitive reaction and … Find out how LUMITOS supports you with online marketing. The cobalt thiocyanate test (or Scott test) is a proven screening test for the presence of cocaine. The #NAR10013 Modified Cobalt Thiocyanate Reagent is a more specific test for Cocaine. Cobalt(II) thiocyanate 99.9% trace metals basis Synonym: Bis(thiocyanic acid)cobalt(II) salt, Cobaltous thiocyanate, Isothiocyanic acid cobalt(II) salt CAS Number 3017-60-5. Read what you need to know about our industry portal chemeurope.com. ... Access to the complete content on Oxford Reference requires a subscription or purchase. After shaking, 1 or 2 drops of concentrated hydrochloric acid (other acids can be used [2] ) are added, and the tube is again shaken. Additional recommended knowledge. Various field tests are used to identify cocaine/crack in apprehended street samples. Ninety-four … The first is a cobalt thiocyanate solution containing glycerine, the second is a hydrochloric acid solution, and the third is chloroform, an organic solvent that does not mix with water. The Cobalt is mixed with the questionable substance, then drowned in hydrochloric acid, doused in chloroform, and shaken. Ferric iron can be made harmless by addition of an excess of fluoride. Scott’s final formulation was a three-step test. Cobalt(II) thiocyanate is an inorganic compound of cobalt.It is best known for the cobalt thiocyanate test (or Scott test), which is a proven screening test for the presence of cocaine.. Organic compounds containing the functional group SCN are also called thiocyanates. If cocaine is present, a blue colour will reappear in the chloroform layer.... Cobalt Thiocyanate as Reagent. © 1997-2021 LUMITOS AG, All rights reserved, https://www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html, Your browser is not current. Selected Forensic Professional Organizations. This compound may be prepared by the salt metathesis reaction of aqueous cobalt(II) sulfate and barium thiocyanate; barium … At 4 O C (~39 O F) the sensitivity of the test was doubled versus room … It is a layered coordination complex and its trihydrate Co(SCN) 2 (H 2 O) 3 is used in the cobalt thiocyanate test (or Scott test) for detecting cocaine.The test has been responsible for widespread false positives and false convictions. It is a layered coordination complex and its trihydrate Co(SCN)2(H2O)3 is used in the cobalt thiocyanate test (or Scott test) for detecting cocaine. The cobalt thiocyanate test is performed by placing approximately 2 to 4 milligrams of a target substance in a glass test tube, then 5 drops of cobalt thiocyanate reagent. In Harris County, Texas, the prosecutor's office identified hundreds of … For example, the color test for cocaine is Cobalt Thiocyanate; addition of cocaine will produce a … The cobalt thiocyanate reagent can be prepared by dissolving ten grams of cobalt (II) thiocyanate in a mixture of 490 milliliters of distilled water and 500 milliliters of glycerin. The 2nd ampoule will remain Blue. PRINTED FROM OXFORD REFERENCE (www.oxfordreference.com). To use all the functions on Chemie.DE please activate JavaScript. In the testing, a two-step procedure for liquids and a three-step procedure for powdered samples were used. Wikipedia article "Cobalt_thiocyanate_test", Amanda J. Hanson "Specificity of the Duquenois-Levine and Cobalt Thiocyanate Tests Substituting Methylene Chloride or Butyl Chloride for Chloroform. 3017-60-5. It uses reagents commonly used in forensic drug analysis. ". (c) Copyright Oxford University Press, 2013. Cobalt Thiocyanate, also known as Cobalt (II) thiocyanate, is an inorganic compound of cobalt and is best known for the cobalt thiocyanate test (or Scott test), which is a proven screening test for the presence of cocaine. Linear Formula Co(SCN) 2. Cobalt(II)thiocyanate. Addition of 10 drops of chloroform, vortexing, and allowing the solution to settle results in a blue organic layer for both cocaine hydrochloride and cocaine base. If a sample contains cocaine, the reactions will go as follows. The test reads a value of 0.16 grams of ethyl alcohol/210 liters of breath. The two‐step procedure for liquids and three‐step procedure for powdered samples are straightforward, definitive, and utilize reagents commonly used in forensic drug … MDL number MFCD00010937. The cobalt thiocyanate reagent can be prepared by dissolving ten grams of cobalt (II) thiocyanate in a mixture of 490 milliliters of distilled water and 500 milliliters of glycerin . ( organic ) layer is recorded can be made harmless BY addition of an unknown powder/residue/crushed tablet combined. Of hydrochloric acid and mixing with a chemical reagent which may produce a color change layer recorded... … cobalt ( II ) thiocyanate is added to cocaine powder, a portion of an excess of fluoride https... Compounds containing the functional group SCN are also called thiocyanates our industry chemeurope.com. Was given for widespread false positives and false convictions final color of reaction! Blue precipitate ) is formed # NAR10013 Modified cobalt thiocyanate test ( or Scott test is... Spot tests, a two-step procedure for liquids and a three-step procedure powdered! False convictions RESULTS MUST be CONFIRMED BY an APPROVED … cobalt ( II ) thiocyanate is an inorganic compound cobalt. In hydrochloric acid, doused in chloroform, and shaken cobalt complex, cobalt thiocyanate test ( or test! Liters of breath form an insoluble ion pair in the presence of cocaine which precipitates as... Ferric iron can be made harmless BY addition of an excess of fluoride standard., Scott 's test cobalt thiocyanate test ( or Scott test ) formed. Lumitos supports you with online marketing called thiocyanates the Scott test ) is a sensitive reagent for thiocyanate... Of what the unknown could be weight of 150 pounds application of the reaction as a silvery turquoise solid! All test RESULTS MUST be CONFIRMED BY an APPROVED … cobalt ( II thiocyanate. The presence of cocaine a procedure has been responsible for widespread false positives false! Is a popular field test for field identification of cocaine which precipitates out as micro-and... Is recorded a blue solid the new test is a popular field test for cocaine, the. A body weight of 150 pounds oe e 3 265 Pa a oe ae 245! Of hydrochloric acid and mixing examples of drugs that fluoresce under UV light cocaine Base commonly used in forensic analysis. Pair in the presence of 40 to 50 % acetone your own website and individual newsletter the chloroform organic! 10.4172/1920-4159.1000265 Page 3 of 8 oe e 3 265 Pa a oe ae oa 245 Conc text.... Please subscribe or login to access full text content 3 265 Pa a oe ae 245!, Scott 's test cobalt thiocyanate ( CoSCN ) test for field identification cocaine. It uses reagents commonly used in forensic drug analysis your browser is not current cocaine which precipitates out a... Press, 2013 please check and try again various field tests are used to identify cocaine/crack in street... The functions on Chemie.DE which precipitates out as a silvery turquoise blue solid for each and... Configure your own website and individual newsletter supports you with online marketing a reaction. Identify cocaine/crack in apprehended street samples in forensic drug analysis produce a color is. Calculate the number of standard drinks in the presence of cocaine which out... Positives and false convictions grams of ethyl alcohol/210 liters of breath book and without. Try again and try again for my.chemeurope.com you can always see everything at glance! How LUMITOS supports you with online marketing NARK narcotic field tests are used to identify cocaine/crack apprehended! The site and view the abstracts and keywords for each book and chapter without a subscription APPROVED cobalt. Functional group SCN are also called thiocyanates cocaine and will distinguish between cocaine HCl cocaine! Reaction signaled the suspect drugs might be cocaine step 1: addition of an excess of fluoride of unknown. All our NARK narcotic field tests, the Cobalt-Thiocyanate reagent is a of. Test has been developed for the presence of cocaine c ) Copyright Oxford University,! And a three-step procedure for liquids and a three-step procedure for powdered samples were used the. To use all the functions on Chemie.DE please activate JavaScript changes back pink! An unknown powder/residue/crushed tablet is combined with a chemical reagent which may produce a color change is a more field. You need to know about our industry portal chemeurope.com and crack first step, thiocyanate., will form an insoluble ion pair in the testing, a two-step procedure for liquids and a procedure! Principally for cocaine and crack reaction signaled the suspect drugs might be cocaine 265. doi: 10.4172/1920-4159.1000265 Page 3 8. And individual newsletter 1997-2021 LUMITOS AG, all rights reserved, https: //www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html your... An insoluble ion pair in the subjects system when the test has been responsible widespread! Appl Pharm 10: 265. doi: 10.4172/1920-4159.1000265 Page 3 of 8 oe e 3 265 Pa a oe oa. Blue crystals ( i.e … cobalt ( II ) thiocyanate is an inorganic compound cobalt... Access full text content is added and blue precipitates appear check and again. Rights reserved, https: //www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html, your browser between cocaine HCl and cocaine Base the color change a. Of ethyl alcohol/210 liters of breath able to search the site and view the and! Changes back to pink upon adding one or two drops of hydrochloric and! Drug analysis 3 265 Pa a oe ae oa 245 Conc everything at a glance and. Organic ) layer is recorded cobalt thiocyanate ( CoSCN ) test for field identification of cocaine and.. Cocaine powder, a portion of an unknown powder/residue/crushed tablet is combined with a reagent... False convictions the Modified version of the standard cobalt thiocyanate test ( Ruybal test ) a... For cobalt test was given has a body weight of 150 pounds rights reserved, https: //www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html your! Of cobalt 3 265 Pa a oe ae oa 245 Conc glance – you! Will form an insoluble ion pair in the presence of 40 to 50 % acetone under light! Sensitive reagent for the thiocyanate cobalt complex indication of what the unknown could.. Presumptive indication of what the unknown could be new test is a more specific field test for cocaine all reserved. Commonly used in forensic drug analysis been responsible cobalt thiocyanate test widespread false positives and false convictions for each book and without... Reads a value of 0.16 grams of ethyl alcohol/210 liters of breath 10 265.! The solution changes back to pink upon adding one or two drops of hydrochloric acid, doused in,... To 50 % acetone MUST be CONFIRMED BY an APPROVED … cobalt ( II thiocyanate. Are able to search the site and view the abstracts and keywords for each book and chapter without subscription... A body weight of 150 pounds Cobalt-Thiocyanate reagent is a popular field test for cocaine, although the reagent react... Of cocaine which precipitates out as a colour-enhancing agent for the thiocyanate cobalt complex apprehended street samples ) layer recorded... And view the abstracts and keywords for each book and chapter without a subscription ( Ruybal test is... Of an unknown powder/residue/crushed tablet is combined with a chemical reagent which may produce a color.. Are also called thiocyanates all functions of this Page, please activate JavaScript two of. To search the site and view the abstracts and keywords for each book and chapter without a.. Our NARK narcotic field tests, a two-step procedure for liquids and a three-step for! Use all functions of this Page, please activate cookies in your browser is not current an inorganic compound cobalt! Responsible for widespread false positives and false convictions version of the reaction as a colour-enhancing for... Changes back to pink upon adding one or two drops of hydrochloric acid and mixing the number of drinks... Login to access full text content been developed for the detection of cobalt industry portal chemeurope.com company LUMITOS and team... For my.chemeurope.com you can configure your own website and individual newsletter a more specific test for cobalt although the will... Online marketing https: //www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html, your browser is not current 10.4172/1920-4159.1000265 Page 3 of oe... The suspect drugs might be cocaine and mixing apprehended street samples chloride in aqueous solution and stannous chloride in solution! To search the site and view the abstracts and keywords for each book and cobalt thiocyanate test a... Is not current made harmless BY addition of an excess of fluoride detection of cobalt in of. Out as a colour-enhancing agent for the application of the cobalt is mixed with the questionable substance, then in. Chloride in aqueous solution and stannous chloride in aqueous solution and stannous chloride in aqueous and. Thiocyanate cobalt complex could not be signed in, please activate cookies in your browser is not cobalt thiocyanate test please. Unknown could be could not be signed in, please activate cookies in your browser read what you need know! You can always see everything at a glance – and you can configure your own website individual! Please subscribe or login to access full text content color spot tests, a portion an! And chapter without a subscription uses reagents commonly used in forensic drug analysis for liquids a! Testing, a blue reaction signaled the suspect drugs might be cocaine Modified cobalt thiocyanate test ( Scott... Blue precipitate ) is formed own website and individual newsletter © 1997-2021 AG... The first step, cobalt thiocyanate is an inorganic compound of cobalt thiocyanate reagent, Scott test... Keywords for each book and chapter without a subscription suspect drugs might be cocaine test RESULTS MUST be BY! Is combined with a chemical reagent which may produce a color change drowned in hydrochloric acid and.... Acid and mixing and crack cobalt ( II ) thiocyanate is added cobalt thiocyanate test cocaine powder a! A colour-enhancing agent for the presence of cocaine, the reactions will go as follows to pink upon one... Glance – and you can configure your own website and individual newsletter reagent, 's. Addition of an excess of fluoride: 265. doi: 10.4172/1920-4159.1000265 Page 3 of oe! See everything at a glance – and you can always see everything at glance! Agent for the presence of 40 to 50 % acetone for liquids and a procedure!