Zirconium Hydride, Grade S

ZrH₂

CAS Number: 7704-99-6 EC Number: 231-727-3 REACH Number: 01-2120760629-43-0000

Zirconium Hydride, Grade S (CAS 7704-99-6, molecular formula ZrH2) is an inorganic chemical supplied as a technical-grade material. It is typically a black to grey powder.

As a getter film in the manufacture of transmitter tubes; as a binding component between grinding agents, carbides, ceramics and metal; as an alloying constituent in powder metallurgy. Applicable as hydrogen source for the foaming of metals.

Typical specifications include: total 97.2 +/- 0.8 %; Hf min. 0.2 % (natural content); H min. 1.9 %.

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Physical and Chemical Properties

Property Value

IUPAC Name

Molecular Weight

93.24g/mol

Appearance

Powder

Color

Black To Gray

Boiling Point

(Decomposes below the boiling point.)

Density

5.6 g/cm3 at 25 °C (Information taken from reference works and the literature.)

Bulk Density

1,000 - 2,000 kg/m3

Solubility in Water

< 0.00008 g/l at 23 °C Method: OECD Test Guideline 29

Grain Size

min. 99.9 % < 45 µm by sieving

Additional Properties

Grain Size min. 99.9 % 45 µm by sieving APS 2.6 +/- 0.6 µm acc. to Blaine, Ignition Point: 250 +/- 50 °C Combustion Rate: 600 +/- 150 sec/50 cm (Albemarle standard) Gain on Ignition: 31.2 +/- 1 % (weight increase by combustion)

Applications

As a getter film in the manufacture of transmitter tubes as a binding component between grinding agents, carbides, ceramics and metal as an alloying constituent in powder metallurgy. Applicable as hydrogen source for the foaming of metals.

Specifications

Zr + Hf total 97.2 +/- 0.8 %
Hf min. 0.2 % (natural content)
H min. 1.9 %
Fe max. 0.1 %
Si max. 0.1 %
Cr max. 0.1 %
Cl max. 0.02 %
Complies with NAVORD/MIL-Z-21353 Complies with ASTM specification B 349-67

Method of Analysis

Determination of oxidation value, particle size distribution and average particle size; gravimetric analysis of zirconium, determination of hydrogen content and impurities.

Handling Instructions

Highly flammable solid. Dust explosion hazard. A fine zirconium hydride powder of exceptional purity; yielding hydrogen by a reversible reaction in vacuum, slowly burning in air. Keep away from flames, sparks and heat sources; use groundconnected metallic apparatus to avoid sudden ignition by electrostatic discharge; wear gloves, a face shield or goggles; in case of fire, cover only with sand, limestone or with a dry extinguishing powder suitable for metal fires class D; DO NOT USE WATER! Refer to our safety data sheet and special precautionary advice for specific safety information.

Legal Disclaimer

The information presented herein is believed to be accurate and reliable but is presented without guarantee or responsibility on the part of Albemarle Corporation and its subsidiaries and affiliates. It is the responsibility of the user to comply with all applicable laws and regulations and to provide for a safe workplace. The user should consider any health or safety hazards or information contained herein only as a guide and should take those precautions which are necessary or prudent to instruct employees and to develop work practice procedures in order to promote a safe work environment. Further, nothing contained herein shall be taken as an inducement or recommendation to manufacture or use any of the herein materials or processes in violation of existing or future patent.