SODIUM ARSENATE HEPTAHYDRATE SOLUTION

Name	Sodium arsenate
Synonyms	Sodium arsenate disodiumarsenate disodium arsorate disodiumarsenicacid Asenicacid,disodiumsalt arsenicacid,disodiumsalt Disodiumhydrogenarsenate TRI-SODIUM ARSENATE 12H2O disodium hydrogen arsenate disodiumhydrogenorthoarsenate Arsenicacid(H3AsO4)disodiumsalt arsenicacid(h3aso4),disodiumsalt SODIUM ARSENATE HEPTAHYDRATE SOLUTION
CAS	7778-43-0
EINECS	231-902-4
InChI	InChI=1/AsH3O4.2Na/c2-1(3,4)5;;/h(H3,2,3,4,5);;/q;2*+1/p-3

Molecular Formula	AsHNa2O4
Molar Mass	185.91
Density	1.7539 [HAW93]
Melting Point	86℃ [HAW93]
Boling Point	decomp at 150°C
Water Solubility	g/100g solution H2O: 5.59 (0.1°C), 29.33 (25°C), 66.5 (98.5°C); solid phase, Na2HAsO4 ·12H2O (0.1°C), Na2HAsO4 ·7H2O (25°C), Na2HAsO4(98.5°C) [KRU93]; slightly soluble alcohol [MER06]
Color	Colorless white powder or solid, effloresces
Use	Used as a reagent for analysis of iron and steel

EPA chemical substance information	information provided by: ofmpeb.epa.gov (external link)
Use	used as a reagent for iron and steel analysis used in pharmaceuticals, reagents, electronics and so on
production method	preparation method a concentrated aqueous solution of disodium hydrogen arsenate Na 2 HAsO 4 is neutralized with a stoichiometric aqueous solution of sodium hydroxide. The neutralized solution was evaporated to crystallize and then recrystallized in hot water. Alternatively, the aqueous solution of arsenic acid is neutralized with an excess of sodium hydroxide, with as little air as possible. By this method, dodecahydrate can be obtained.
category	toxic substances
toxicity grade	highly toxic
Acute toxicity	intraperitoneal-rat LDL0: 34.72 mg/kg
flammability hazard characteristics	non-flammable substances; Toxic arsenide vapor emitted by heat
storage and transportation characteristics	The warehouse is ventilated and dried at low temperature, separate storage of food additives
Occupational Standard	TLA-TWA 0.2 mg (arsenic)/m3; Tel 0.6 mg (arsenic)/M3
toxic substance data	information provided by: pubchem.ncbi.nlm.nih.gov (external link)

Last Update：2024-04-10 22:29:15

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CAS: 7778-43-0
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