Chromium(VI) oxide CAS#1333-82-0

Chromium(VI) oxide Chemical Properties

Boiling point 

330 °C

bulk density

900kg/m3

density 

2.7

vapor pressure 

0Pa at 25℃

Fp 

250°C

storage temp. 

Store below +30°C.

solubility 

1.667g/l

pka

-0.61[at 20 ℃]

form 

macroporous

color 

Reddish-violet

Specific Gravity

2.7

PH

<1 (100g/l, H2O, 20℃)

Water Solubility 

Highly soluble

FreezingPoint 

170~172℃

Sensitive 

Hygroscopic

Merck 

14,2235

crystal system

Nogata

Space group

Ama2

Lattice constant

a/nmb/nmc/nmα/oβ/oγ/oV/nm30.57430.85570.47899090900.2353

Exposure limits

ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin)
OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3

Stability:

Stable. Strong oxidizer. Reacts with most organic material in a violent and often explosive fashion. Moisture sensitive.

InChI

1S/Cr.3O

InChIKey

WGLPBDUCMAPZCE-UHFFFAOYSA-N

SMILES

O=[Cr](=O)=O

CAS DataBase Reference

1333-82-0(CAS DataBase Reference)

NIST Chemistry Reference

Chromium trioxide(1333-82-0)

EPA Substance Registry System

Chromium(VI) trioxide (1333-82-0)

Safety Information

Risk Statements 

45-46-9-24/25-26-35-42/43-48/23-50/53-62-8

Safety Statements 

53-45-60-61-36/37/39-28-26-22

OEB

E

OEL

TWA: 0.0002 mg/m3 (8-hours)

RIDADR 

UN 1463 5.1/PG 2

WGK Germany 

3

RTECS 

GB6650000

TSCA 

TSCA listed

HazardClass 

5.1

PackingGroup 

II

HS Code 

28191000

Storage Class

5.1A - Strongly oxidizing hazardous materials

Hazard Classifications

Acute Tox. 2 Inhalation
Acute Tox. 3 Dermal
Acute Tox. 3 Oral
Aquatic Acute 1
Aquatic Chronic 1
Carc. 1A
Eye Dam. 1
Muta. 1B
Ox. Sol. 1
Repr. 2
Resp. Sens. 1
Skin Corr. 1A
Skin Sens. 1
STOT RE 1 Inhalation
STOT SE 3

Hazardous Substances Data

1333-82-0(Hazardous Substances Data)

Toxicity

LD50 oral (rat) 80 mg/kg
PEL (OSHA) 0.1 mg (CrO3)/m3 (ceiling)
TLV-TWA (ACGIH) 0.05 mg (Cr)/m3

IDLA

15 mg Cr(VI)/m3