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A7714412

Tungsten , 99.9%metalsbasis,50nm , 7440-33-7

Synonym(s):
Tungsten;W;W 00BO35;W 00BO55;W 00BO65

CAS NO.:7440-33-7

Empirical Formula: W

Molecular Weight: 183.84

MDL number: MFCD00011461

EINECS: 231-143-9

Pack Size Price Stock Quantity
1g RMB28.80 In Stock
5G RMB77.60 In Stock
25G RMB316.00 In Stock
100G RMB871.20 In Stock
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Update time: 2022-07-08

PRODUCT Properties

Melting point: 3410 °C (lit.)
Boiling point: 5660 °C (lit.)
Density  19.3 g/mL at 25 °C (lit.)
vapor pressure  0Pa at 3000℃
Flash point: -23 °C
storage temp.  no restrictions.
form  wire
Specific Gravity 19.3
color  Silver-gray
Resistivity 4.9 μΩ-cm, 20°C
Water Solubility  insoluble
Merck  13,9884
Exposure limits ACGIH: TWA 2 ppm; STEL 4 ppm
OSHA: TWA 2 ppm(5 mg/m3)
NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3)
Stability: Stable. Dust is flammable, though not likely to present a hazard if normal good practice is used.

Description and Uses

Tungsten was recognized as a distinct element in 1779 by Peter Woulfe, but not isolated until 1783, by Jose and Fausto d’Elhuyar. The average tungsten concentration in the earth’s crust is ~0.006%. Tungsten occurs naturally as tungstate, mainly in compounds such as wolframites and scheelites.

Ferrous and nonferrous alloys, filaments in incandescent lamps, heating elements, welding electrodes, manufacture of abrasives and tools, manufacture of textiles and ceramics.

Safety

Symbol(GHS) 
GHS02
Signal word  Danger
Hazard statements  H228-H252
Precautionary statements  P210-P235-P240-P241-P280-P370+P378
Hazard Codes  F,Xi,N,Xn
Risk Statements  11-36/38-67-65-62-51/53-48/20-38
Safety Statements  6-26-36-62-61-36/37-16
RIDADR  UN 3089 4.1/PG 2
OEB B
OEL TWA: 5 mg/m3, STEL: 10 mg/m3 [*Note: The REL also applies to other insoluble tungsten compounds (as W).]
WGK Germany  -
RTECS  YO7175000
TSCA  Yes
HazardClass  4.1
PackingGroup  III
HS Code  81011000

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