Chromium suppliers

Properties

Melting point:：

1857 °C (lit.)

Boiling point:：

2672 °C (lit.)

Density ：

7.14 g/mL at 25 °C (lit.)

Flash point:：

50 °F

storage temp. ：

no restrictions.

solubility ：

reacts with dilute acid solutions

form ：

powder

color ：

Silver-gray

Specific Gravity：

7.2

PH：

<1 (H2O, 20°C)

Odor：

Odorless

Resistivity：

12.7 μΩ-cm, 20°C

Water Solubility ：

Insoluble in water.

Merck ：

13,2252

Exposure limits：

TLV-TWA: chromium metal 0.5 mg/m³ (ACGIH and MSHA), 1 mg/m³ (OSHA); Cr(II) and Cr(III) compounds 0.5 mg/m³ (ACGIH); Cr(VI) compounds, water soluble and certain water insoluble, 0.05 mg/m³ (ACGIH).

Stability:：

Stable. Incompatible with carbonates, strong bases, mineral acids, lithium, sulfur dioxide, strong acids.

CAS DataBase Reference：

7440-47-3(CAS DataBase Reference)

IARC：

3 (Vol. Sup 7, 49) 1990

NIST Chemistry Reference：

Chromium(7440-47-3)

EPA Substance Registry System：

Chromium (7440-47-3)

SecurityInformation

Symbol(GHS) ：

GHS02,GHS08,GHS09

Signal word ：

Warning

Hazard statements ：

H410-H351-H228

Precautionary statements ：

P201-P202-P280-P308+P313-P405-P501a-P210-P240

Hazard Codes ：

F,C,Xn,Xi

Risk Statements ：

11-20/21/22-34-40-23-67-36

Safety Statements ：

16-26-36/37/39-45-36/37-27

OEB：

C

OEL：

TWA: 0.5 mg/m3

RIDADR ：

UN 2924 3/PG 2

WGK Germany ：

3

RTECS ：

GB4200000

Autoignition Temperature：

580°C

TSCA ：

Yes

HS Code ：

8112 21 90

HazardClass ：

4.1

PackingGroup ：

III

Hazardous Substances Data：

7440-47-3(Hazardous Substances Data)

Toxicity：

Elemental chromium and certain chromium compounds have been designated as carcinogens, hazardous substances, hazardous waste constituents, and priority toxic pollutants. Some of those compounds designated as hazardous are chromic acetate, chromic acid, chromic sulfate, and chromous chloride. Although chromium in the 6+ state is regarded as being the most carcinogenic, there are 6+ compounds that appear to be non-carcinogenic. In addition to their possible carcinogenicity, chromium compounds may have local allergic effects leading to dermatitis. Systemically, 6+ chromium compounds are irritants to the respiratory system and may give rise to pulmonary edema.

IDLA：

250 mg Cr/m3