398063

Sodium dichromate dihydrate

ACS reagent, ≥99.5%

• Synonym(s): Sodium bichromate
• Linear Formula: Na₂Cr₂O₇ · 2H₂O
• CAS Number: 7789-12-0
• Molecular Weight: 298.00
• EC Number: 234-190-3
• MDL number: MFCD00149166
• UNSPSC Code: 12352302
• PubChem Substance ID: 329755905
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 200
• Assay: ≥99.5%
• form: crystals
• reaction suitability: reagent type: oxidant
• impurities: ≤0.005% NH₄OH ppt.; ≤0.005% insolubles
• pH: 3.5 (20 °C, 100 g/L)
• mp: 91 °C (lit.)
• anion traces: chloride (Cl^-): ≤0.005%; sulfate (SO₄^2-): ≤0.01%
• cation traces: Al: ≤0.002%; Ca: ≤0.003%
• SMILES string: O.O.[Na+].[Na+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O
• InChI: 1S/2Cr.2Na.2H2O.7O/h;;;;2*1H2;;;;;;;/q;;2*+1;;;;;;;;2*-1
• InChI key: JYDRNIYTFCBIFC-UHFFFAOYSA-N

Description

General description

Sodium dichromate dehydrate (SDD), a hexavalent chromium compound is commonly used as an oxidizing agent. Chromium (VI) compounds are genotoxic and group 1 IARC (International Agency for Research on Cancer) carcinogen. SDD is one of the common contaminants found in drinking water. Its toxic effects and carcinogenicity has been studied.

Application

Sodium dichromate dehydrate may be used in preparing Jones reagent which is employed for oxidation reactions. It may be used in the oxidation of arylalkanes.

Safety Information

• Pictograms: GHS03,GHS06,GHS08,GHS05,GHS09
• Signal Word: Danger
• Hazard Statements: H272,H301,H312,H314,H317,H330,H334,H340,H350,H360FD,H372,H410
• Precautionary Statements: P210 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - Eye Dam. 1 - Muta. 1B - Ox. Sol. 2 - Repr. 1B - Resp. Sens. 1 - Skin Corr. 1B - Skin Sens. 1 - STOT RE 1 Inhalation
• Storage Class Code: 5.1B - Oxidizing hazardous materials
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable