Rhodium manufacturers and suppliers

Rhodium suppliers

Properties

Melting point:: 1966 °C (lit.)

Boiling point:: 3727 °C (lit.)

Density: 12.41 g/cm3 (lit.)

storage temp.: Inert atmosphere,Room Temperature

solubility: insoluble in acid solutions, slightly soluble in aqua regia

form: wire

Specific Gravity: 12.41

color: Red

PH: 0.5 (20°C in H2O)

Resistivity: 4.33 μΩ-cm, 20°C

Water Solubility: Insoluble

Merck: 14,8186

Exposure limits: ACGIH: Ceiling 2 ppm
OSHA: Ceiling 5 ppm(7 mg/m3)
NIOSH: IDLH 50 ppm; Ceiling 5 ppm(7 mg/m3)

CAS DataBase Reference: 7440-16-6(CAS DataBase Reference)

NIST Chemistry Reference: Rhodium(7440-16-6)

EPA Substance Registry System: Rhodium (7440-16-6)

Safety Information

Symbol(GHS): GHS07,GHS08,GHS02

Signal word: Danger

Hazard statements: H315-H319-H228-H413-H332-H335-H373

Precautionary statements: P210-P240-P241-P280-P370+P378a-P261-P305+P351+P338-P405-P501a-P260-P314-P304+P340-P312a-P403+P233

Hazard Codes: C,Xi,F

Risk Statements: 36/38-11-36/37/38-36-34-23

Safety Statements: 26-24/25-16-22-36-17-45-36/37/39

OEB: D

OEL: TWA: 0.1 mg/m3

RIDADR: UN 3089 4.1/PG 2

WGK Germany: 3

RTECS: VI9069000

TSCA: Yes

HazardClass: 4.1

PackingGroup: III

HS Code: 7110390000

Hazardous Substances Data: 7440-16-6(Hazardous Substances Data)

IDLA: 100 mg Rh/m3

Use

Metallic rhodium is the whitest of the platinum metals and does not tarnish under atmospheric conditions. It is insoluble in most acids, including aqua regia, but is attacked by chlorine at elevated temperatures and by hot fuming sulfuric acid. Liquid rhodium dissolves oxygen, and ingots are made by argon-arc melting. At temperatures above 1200 C, rhodium reacts with oxygen to form rhodium oxide, Rh2O3. Rhodium is used to make the nibs of writing pens, to make resistance windings in high-temperature furnaces, for high-temperature thermocouples, as a catalyst, and for laboratory dishes. It is the hardest of the platinum-group metals; the annealed metal has a Brinell hardness of 135. Rhodium is also valued for electroplating jewelry, electric contacts, hospital and surgical instruments, and especially reflectors. The most important alloys of rhodium are rhodium platinum. They form solid solutions in any proportion, but alloys of more than 40% rhodium are rare. Rhodium is not a potent hardener of platinum but increases its high-temperature strength. It is easily workable and does not tarnish or oxidize at high temperatures. These alloys are used for thermocouples and in the glass industry.

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