Disodiumhydrogenarsenate
Sodium arsenate
CAS: 7778-43-0
Molecular Formula: AsHNa2O4
Disodiumhydrogenarsenate - Names and Identifiers
| 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 |
Disodiumhydrogenarsenate - Physico-chemical Properties
| 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 |
Disodiumhydrogenarsenate - Risk and Safety
| UN IDs | 1685 |
| HS Code | 28429090 |
| Hazard Class | 6.1(a) |
| Packing Group | II |
| Toxicity | cyt-hmn:leu 7200 mmol/L MUREAV 88,73,81 |
Disodiumhydrogenarsenate - Reference Information
| 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
