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Tungsten, also known as wolfram, is a chemical element with symbol W and atomic number 74.
T 8691 (OTTO) Tungsten foil, 0.05mm thick, 99.95%+ Cas -7440-33-7 - used to make heat shielding, heating element and carrier of the vacuum furnace.
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Certificate Of Analysis
(For eg. B 1615-0108)
Other Documents
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7439-98-7
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