| Agent Name |
Arsenazo III |
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| CAS Number |
62337-00-2 |
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| Formula |
C22-H18-As2-N4-O14-S2.2Na |
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| Major Category |
Dyes |
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| Synonyms |
Disodium 3,6-bis((o-arsonophenyl)azo)-4,5-dihydroxynaphthalene-2,7-disulphonate; [ChemIDplus] |
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| Category |
Azo Dyes |
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| Description |
Purple to black powder; [MSDSonline] |
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| Sources/Uses |
"Metal indicators are organic compounds that form specifically colored metal ion complexes in aqueous media. These dye reactions can be employed for detection of the equivalence point in volumetry (complexometry), as well as for concentration determinations in colorimetry or photometry." Arsenazo III is used for the complexometric determination of lanthanides, Th, and Y. It is used for the photometric determination of lanthanides, Sc, Th, U, Y, and Zr. [Ullmann] |
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| Comments |
An organic arsenic compound that is toxic by inhalation or ingestion; A skin irritant; [MSDSonline] See "Arsenic and compounds." |
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| Exposure Assessment |
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| Explanatory Notes |
ERG Guide #151 is for UN3280 (organoarsenic compound); |
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| Flammability (NFPA) |
1: must be preheated |
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| Links to Other NLM Databases |
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