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Sodium dichromate dihydrate, for analysis, ExpertQ®, ACS

- Synonyms: Sodium bichromate, Sodium pyrochromate
- Na2Cr2O7·2H2O
- M = 298,00 g/mol
- CAS [7789-12-0]
- EINECS-No.: 234-190-3
- Solub. in water: (20 ºC): 731,8 g/l
- Melting point: 356,7 ºC (anhydrous substance)
- Boiling point: 400 ºC (decomposes)
- LD 50 (oral, rat): 50 mg/kg
- EC-Index-No.: 024-004-01-4
- ADR: 6.1 T5 III UN 3288
- IMDG: 6.1 III UN 3288
- IATA/ICAO: 6.1 III UN 3288
- GHS-signal word: Danger
- GHS-H sentences: H272 - H301 - H330 - H334 - H340 - H350 - H360FD - H372 - H314 - H400 - H410 - H312 - H317
- GHS-P sentences: P221 - P301+P310 - P303+P361+P353 - P305+P351+P338 - P320 - P370+P378 - P405 - P501a
- Tariff number: 2841 30 00 00
- Applications: analytical chemistry, laboratory reagent, oxidizing agent (manufacture of dyes), starting material for synthesis of chromic acid and other chromates.
- Appearance: Orange solid

SPECIFICATIONS
assay (iodometric): 99,5 - 100,5 %
identity: passes test
insoluble in water: max. 0,005 %
ammonium hydroxide precipitate: max. 0,005 %
chlorides (Cl): max. 0,002 %
sulfates (SO4): max. 0,01 %
aluminium (Al): max. 0,002 %
calcium (Ca): max. 0,002 %
copper (Cu): max. 0,001 %
iron (Fe): max. 0,002 %
lead (Pb): max. 0,002 %
magnesium (Mg): max. 0,005 %
potassium (K): max. 0,01 %