Gallium arsenide pieces, % trace metals basis; CAS Number: AsGa; find Sigma-Aldrich MSDS, related peer-reviewed papers, technical. SAFETY DATA SHEET. GALLIUM ARSENIDE OPTICAL CRYSTAL. According to Regulation (EC) No/ (REACH). Revision MATERIAL SAFETY DATA SHEET. I. PRODUCT IDENTIFICATION. Trade Name: Gallium Arsenide. Synonym: Gallium Monoarsenide. Formula: GaAs. CAS #.

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Rinse mouth with water. GaAs diodes can be used for the detection of X-rays. Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. We as supplier shall not be held liable for any damage resulting from handling or from contact with the above product. An Introduction To Semiconductor Microtechnology 2nd ed.

Thanks Matt, Reading between the lines on all the safety details, it seems like this stuff is too toxic to machine.

Because of its wide bandgap, pure GaAs is highly resistive. In other projects Wikimedia Commons.

I have an enquiry from a customer but I hear the stuff, although not intrinsicaly toxic, can libreate Arenic and Gallium compounds which, when in contact with water, acids or alkalais can give off nasty stuff. In addition, a Si crystal has a very stable structure and can be grown to very large diameter boules and processed with very good yields.

In case of eye contact Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician. I am pretty sure that it is a carcinogen. The measurement device contains a light source and a device for the spectral detection of the band gap. Autumn Safety Kid Safety Looking for safety pic. Evacuate personnel to safe areas. Skin protection Wear impervious clothing.


It is also used in the manufacture of Gunn diodes for the generation of microwaves.


I was never given proper gear to separate myself from the dust which can stick to your gass underneath your fingernails. First, silicon is abundant and cheap to process in the form of silicate minerals. Show this safety data sheet to the doctor in attendance. Single crystal ingots are produced using high purity gallium and arsenic as the starting material.

On a more practical level, it’s also very brittle. Uses advised against no data available 1. Attacked by cold concentrated hydrochloric acid. Gallium arsenide GaAs is a compound of the elements gallium and arsenic. Monitor for pulmonary edema and treat if necessary For eye contamination, flush eyes immediately with water. Symptoms of exposure to this compound may include diarrhea, hypotension, weakness, cardiac failure, convulsions, coma, nervousness, headache, dizziness hypothermia, abdominal cramps, irritability, paralysis, cardiac arrhythmia, respiratory edema, dyspnea, ggaas, coughing, peripheral neuropathy, optic neuritis, anesthesia, paresthesia, alopecia, dermatitis, cirrhosis of the liver, salivation, aplastic anemia, kidney damage, anuria, liver damage, jaundice, hematuria, proteinuria and leukopenia.

This low carrier concentration is similar to an intrinsic perfectly undoped crystal, but much easier to achieve in practice. Since the position of the band gap is temperature dependent, it shifts about 0. For precautions see section 2.

Because GaAs and AlAs have almost the same lattice constantthe layers have very little induced strainwhich msdz them to be grown almost arbitrarily thick.


Avoid exposure – obtain special instructions before use. If not breathing, give artificial respiration. The electronic properties of these defects interacting with others cause the Fermi level to be pinned to near the center of the bandgap, so that this GaAs crystal has very low concentration of electrons and holes. Another advantage of Gaaas is that it has a direct band gapwhich means that it can be used to absorb and emit light efficiently.

GaAs – Gallium Arsenide – Epitaxy Ready Polished Wafers: Wafer Technology

I’m gonna “no bid” on this one and offer him Germanium instead. For those that might read this down the road, GaAs dust is quite dangerous, at least long term exposure. Establish a patent airway. Thanks for your input mate. Consequently, GaAs thin films must be supported on a substrate material.

Protect container against physical damage. Oxidation of GaAs occurs in air and degrades performance of the semiconductor. GaAs – Gallium Arsenide Wafer Technology offers single crystal gallium arsenide grown at low pressure from high purity polycrystalline gallium arsenide in a vertical temperature gradient VGF-Vertical Gradient Freeeze.

Anyone machined this stuff? Overall summary evaluation of carcinogenic risk to humans is Group 1: This allows extremely high performance and high electron mobility HEMT transistors and other quantum well devices. Do not work with any dust from any semiconductor period.