PLATINUM RHODIUM manufacturers and suppliers

PLATINUM RHODIUM suppliers

PLATINUM RHODIUM

CAS:: 11107-71-4

MF:: PtRh

MW:: 297.98

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Properties

form: wire

color: Silver

Water Solubility: Insoluble in water.

Exposure limits: ACGIH: TWA 1 mg/m3
OSHA: TWA 0.002 mg/m3
NIOSH: TWA 1 mg/m3

Safety Information

Symbol(GHS): GHS02

Signal word: Warning

Hazard statements: H228

Precautionary statements: P403-P501c

WGK Germany: 3

Use

The addition of rhodium to platinum also providesimproved mechanical properties to platinumand increases its resistance to corrosion.For applications at high temperatures, the platinum–rhodium alloys are preferred because ofretention of good mechanical properties includinggood hot strength and very little tendencytoward volatilization or oxidation. Platinum–rhodium alloys are used for thermocouplesfor temperatures above 1100°C. Thestandard thermocouple is platinum vs. platinum–10% rhodium. Other thermocouples forhigher operating temperatures use platinum–rhodium alloys in both elements. Thealloys of platinum–rhodium are widely used inthe glass industry, particularly as glass-fiberextrusion bushings. Rhodium increases thehigh-temperature strength of platinum withoutreducing its resistance to oxidation. Platinum–rhodium gauze for use as a catalyst inproducing nitric acid from ammonium contains90% platinum and 10% rhodium.

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