MilliporeSigma
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1.06336

Supelco

Sodium dichromate dihydrate

for analysis EMSURE® ACS

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

Quality Level

grade

ACS reagent

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 (SO42-): ≤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

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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

Signal Word

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - 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

Certificate of Analysis

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