1.06336

Sodium dichromate dihydrate

for analysis EMSURE^® ACS

• Synonym(s): Sodium dichromate dihydrate, Sodium bichromate, Sodium pyrochromate
• Empirical Formula (Hill Notation): Cr₂Na₂O₇ · 2H₂O
• CAS Number: 7789-12-0
• Molecular Weight: 298.00
• MDL number: MFCD00149166
• UNSPSC Code: 12352302
• EC Index Number: 234-190-3

Properties

• grade: ACS reagent
• Quality Level: 300
• product line: EMSURE^®
• Assay: 99.5-100.5% (iodometric)
• form: solid
• potency: 50 mg/kg LD₅₀, oral (Rat); 1000 mg/kg LD₅₀, skin (Rabbit)
• impurities: ≤0.005% Insoluble matter
• pH: 3.5 (20 °C, 100 g/L in H₂O)
• bp: 400 °C/1013 hPa (decomposition)
• mp: 356.7 °C (anhydrous substance)
• density: 2.35 g/cm³ at 20 °C
• bulk density: 1200 kg/m³
• anion traces: chloride (Cl^-): ≤0.002%; sulfate (SO₄^2-): ≤0.01%
• cation traces: Al: ≤0.002%; Ca: ≤0.002%; Cu: ≤0.001%; Fe: ≤0.002%; K: ≤0.01%; Mg: ≤0.005%; Pb: ≤0.002%
• storage temp.: 2-30°C
• InChI: 1S/2Cr.2Na.2H2O.7O/h;;;;2*1H2;;;;;;;/q;;2*+1;;;;;;;;2*-1
• InChI key: JYDRNIYTFCBIFC-UHFFFAOYSA-N

Description

Analysis Note

Assay (iodometric): 99.5 - 100.5 %
Identity: passes test
Insoluble matter: ≤ 0.005 %
Chloride (Cl): ≤ 0.002 %
Sulfate (SO₄): ≤ 0.01 %
Al (Aluminium): ≤ 0.002 %
Ca (Calcium): ≤ 0.002 %
Cu (Copper): ≤ 0.001 %
Fe (Iron): ≤ 0.002 %
K (Potassium): ≤ 0.01 %
Mg (Magnesium): ≤ 0.005 %
Pb (Lead): ≤ 0.002 %

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Pictograms: GHS03,GHS05,GHS06,GHS08,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