Agent Name

Arsenazo III

CAS Number

62337-00-2

Formula

C22-H18-As2-N4-O14-S2.2Na

Major Category

Metals

Synonyms

Disodium 3,6-bis((o-arsonophenyl)azo)-4,5-dihydroxynaphthalene-2,7-disulphonate; [ChemIDplus]

Category

Arsenic Compounds, Organic

Description

Purple to black powder; [MSDSonline]

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]

Comments

An organic arsenic compound that is toxic by inhalation or ingestion; A skin irritant; [MSDSonline]

Exposure Assessment
PEL (OSHA)

0.5 mg/m3, as As

Explanatory Notes

ERG Guide #151 is for UN3280 (organoarsenic compound);

Links to Other NLM Databases
Toxicity Information

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Chemical Information

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Related Information in HazMap
Other Information

No other related information on this agent was found.