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Topic: Chromotropic acid

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	JAIC 1994, Volume 33, Number 1, Article 4 (pp. 47 to 53)
		The combined use of the iodide-iodate test and the chromotropic acid test has been shown to be a good indicator of the suitability of a material for use in the storage and display of antiquities that are susceptible to volatile organic acids and formaldehyde.
		The iodide-iodate test (Feigl 1954) is used to detect volatile organic acids, and the chromotropic acid test (West and Sen 1956) is used to detect free formaldehyde.
		The chromotropic acid test is based on the reaction of formaldehyde with a solution of chromotropic acid (1,8-dihydroxynaphthalene-3,6-disulfonic acid) to produce a purple species in solution (West and Sen 1956).
	aic.stanford.edu /jaic/articles/jaic33-01-004.html (2521 words)

	Bioline International Official Site (site up-dated regularly)
		[2] This study was performed to detect the presence of formaldehyde in textiles by the chromotropic acid method and to assess the effect of washing on the formaldehyde content.
		A few crystals of chromotropic acid were added to 2 ml of 72% concentrated sulfuric acid in another test tube (2nd test tube).
		In conclusion, the chromotropic acid test is a simple office method for detection of formaldehyde in textiles and can be used in the practical management of patients with suspected textile dermatitis.
	www.bioline.org.br /request?dv04119 (1129 words)

	Test means and method for interference resistant determination of oxidizing substances - Patent 4119405
		The buffer is also critical and maintains a predetermined pH range of from 3.2 to 4.7 for a uric acid determination and from 4.7 to 5.5 for a glucose or cholesterol determination.
		The prior art, insofar as it teaches the use of hydrazone indicators in analysis for H.sub.2 O.sub.2, suggests that the reaction between MBTH and dimethylaniline is resistant to the effects of reducing substances in a sample.
		Coupling is believed to occur through a mechanism such as that illustrated for 3-methyl-2-benzothiazolinone hydrazone (MBTH) and chromotropic acid (CTA) in Diagram A although this is not a theory on which the invention must be based.
	www.freepatentsonline.com /4119405.html (4696 words)

	Chromotropic acid sodium salt dihydrate formaldehyde determination - 5808-22-0 - Catalog of Chemical Suppliers (Site not responding. Last check: 2007-11-03)
		Chromotropic acid sodium salt dihydrate formaldehyde determination - 5808-22-0 - Catalog of Chemical Suppliers
		If you are a supplier you may also add your own catalog of chemicals for free.
		CHROMOTROPIC ACID (DISODIUM SALT M.W. 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt dihydrate
	www.chemexper.com /chemicals/supplier/cas/5808-22-0.html (103 words)

	Calibration Curve Procedure
		Dissolve.10 grams of Chromotropic acid powder in a 100ml volumetric flask and dilute to mark with distilled water.
		After acid is dissolved transfer solution to 50ml glass beaker and cover with Parafilm.
		If acid is not added slowly, some loss of sample could occur due to splattering.
	www.rti-dmc.com /wetchem1.htm (1275 words)

	Merck KGaA - Photometric Reagents - (Site not responding. Last check: 2007-11-03)
		Chromotropic acid disodium salt dihydrate GR for analysis
		Oxalic acid bis (cyclohexylidene hydrazide) GR for analysis (reagent for copper)
		Bathophenanthrolinedisulfonic acid disodium salt trihydrate GR for analysis
	pb.merck.de /servlet/PB/menu/1074850?pbanker=Mg (736 words)

	The Bioline EPrints Archive - Detection of formaldehyde in textiles by chromotropic acid method (Site not responding. Last check: 2007-11-03)
		Rao, Sanath and Shenoy, Shruthakirthi D and Davis, Suraj and Nayak, Sudhakar (2004) Detection of formaldehyde in textiles by chromotropic acid method.
		AIM: To detect the presence of formaldehyde in various types of textiles by the chromotropic acid method and to assess the effect of washing on the formaldehyde content.
		METHODS: Twenty randomly selected textiles from a local cloth store were tested for formaldehyde by the chromotropic acid method.
	bioline.utsc.utoronto.ca /archive/00002691 (222 words)

	Safety (MSDS) data for chromotropic acid disodium salt hydrate (Site not responding. Last check: 2007-11-03)
		Safety (MSDS) data for chromotropic acid disodium salt hydrate
		Synonyms: 4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt dihydrate, disodium chromotropate dihydrate, 1,8-Dihydroxy-3,6-naphthaleledisulfonic acid disodium salt dihydrate, 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt dihydrate, 1,8-Dihydroxynaphthalene-3,6-disulfonic acid disodium salt dihydrate, chromotropic acid disodium salt dihydrate
		Incompatible with strong oxidizers, strong acids, acid chlorides, acid anhydrides.
	physchem.ox.ac.uk /MSDS/CH/chromotropic_acid_disodium_salt_hydrate.html (130 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
		Disodium-1: 8-dihydroxy naphthalene-3: 6-disulfonate (chromotropic acid, sodium salt) yields colored lakes with various cations.
		Data are presented on the composition and stability of the uranyl ion-chromotropic acid chelate as determined by spectrophotometric examination.
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=4747899 (132 words)

	Canadawide Scientific - Chromotropic Acid, Disodium Salt, Dihydrate, 'Baker Analyzed' Reagent
		Canadawide Scientific - Chromotropic Acid, Disodium Salt, Dihydrate, 'Baker Analyzed' Reagent
		Chromotropic Acid, Disodium Salt, Dihydrate, 'Baker Analyzed' Reagent
		Please note: The prices shown may not reflect those specific to your company or organization.
	canadawide.ca /products/JTJ166.html (63 words)

	Chromo To Cobalt And Chromotropic Acid Disodium Salt Dihydrate - Cole-Parmer Catalog (Site not responding. Last check: 2007-11-03)
		Cole-Parmer Catalog > Chemicals > Chemicals C > Chromo to Cobalt > Chromotropic Acid Disodium Salt Dihydrate
		Chromotropic Acid Disodium Salt Dihydrate - Product Detail
		Chromotropic Acid Disodium Salt Dihydrate (Certified ACS) (25g)
	www.coleparmer.com /catalog/product_view.asp?sku=8800570 (65 words)

	Abstract of article (Site not responding. Last check: 2007-11-03)
		The method is based on oxidation of phorate to sulphoxide and then to sulphones by concd.
		sulphuric acid and its hydrolysis in acidic condisions at ~100
		C to release formaldehyde which is then treated with chromotropic acid to produce a purple color dye, which has an absorbance maximum at 575nm.
	www.chem.uw.edu.pl /chemanal/toc/abs44_4/abs10.htm (133 words)

	Chromotropic Acid, Disodium Salt, Dihydrate
		Ingredient CAS No Percent Hazardous --------------------------------------- ------------ ------------ --------- Chromotropic acid, disodium salt 129-96-4 90 - 100% Yes
		Whatever cannot be saved for recovery or recycling should be managed in an appropriate and approved waste disposal facility.
		----------------------------------------------- ----- --- ---- ----- Chromotropic acid, disodium salt (129-96-4) Yes Yes No Yes --------\Federal, State & International Regulations - Part 1\---------------- -SARA 302- ------SARA 313------ Ingredient RQ TPQ List Chemical Catg.
	www.jtbaker.com /msds/englishhtml/c4455.htm (968 words)

	Chromotropic Acid Disodium Salt, ACS, Chemistry Supplies and Laboratory Chemicals
		Chromotropic Acid Disodium Salt, ACS, Chemistry Supplies and Laboratory Chemicals
		The LAB DEPOT is your source for laboratory chemicals equipment and scientific supplies including Chromotropic Acid Disodium Salt, ACS, reagent chemicals, research products and lab test kits for water purification and pH sampling.
		The LAB DEPOT website has been designed for ease of use.
	www.labdepotinc.com /Chemical_Details~pid~C1629.aspx (132 words)

	[No title] (Site not responding. Last check: 2007-11-03)
		Work Hygienic Practices: NOT PROVIDED Supplemental Safety and Health: THIS ITEM IS PART OF A 16 PART KIT FOR QUALITATIVE WATER ANALYSIS, WARDS PART NUMBER 361225.
		======================================================= Transportation Information ======================================================= Responsible Party Cage: UO627 Trans ID NO: 158318 Product ID: CHROMOTROPIC ACID, 0.1M SOL (SEE SUPPL) MSDS Prepared Date: 05/09/2001 Review Date: 08/15/2001 MFN: 1 Multiple KIT Number: 0 Kit Part IND: Y Unit Of Issue: CY Type Of Container: CYLINDER Additional Data: UNIT SIZE: < = 4 L., PER MSDS.
		FIRST AID: INGESTION: IF SWALLOWED IF CONSCIOUS GIVE ONE TO TWO GLASSES OF WATER TO DRINK.
	www.kauaicc.hawaii.edu /msds/files/clj/cljhn.html (456 words)

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