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A6257112

Niobium Powder , 99.9%,40-60nm , 7440-03-1

CAS NO.:7440-03-1

Empirical Formula: Nb

Molecular Weight: 92.91

MDL number: MFCD00011126

EINECS: 231-113-5

Pack Size Price Stock Quantity
5G RMB367.20 In Stock
25G RMB1439.20 In Stock
100G RMB4399.20 In Stock
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Update time: 2022-07-08

PRODUCT Properties

Melting point: 2468 °C (lit.)
Boiling point: 4742 °C (lit.)
Density  8.57 g/mL at 25 °C (lit.)
storage temp.  -20°C
solubility  insoluble in acid solutions
form  wire
Specific Gravity 8.57
color  Silver-gray
Resistivity 13-16 μΩ-cm, 20°C
Water Solubility  Insoluble in water.
Merck  13,6584
Exposure limits ACGIH: TWA 0.5 ppm(2.5 mg/m3); Ceiling 2 ppm (Skin)
OSHA: TWA 3 ppm
NIOSH: IDLH 30 ppm(250 mg/m3); TWA 3 ppm(2.5 mg/m3); Ceiling 6 ppm(5 mg/m3)
Stability: Stable. Incompatible with strong bases, strong oxidizing agents, halogens, oxygen.

Description and Uses

Refined niobium metal is most useful as an alloy with other metals. It is used to producespecial stainless steel alloys, to make high-temperature magnets, as special metals for rocketsand missiles, and for high- and low-temperature–resistant ceramics. Stainless steel that hasbeen combined with niobium is less likely to break down under very high temperatures.This physical attribute is ideal for construction of both land- and sea-based nuclear reactors.Niobium has special cryogenic properties. It can withstand very cold temperatures, whichimproves its ability to conduct electricity. This characteristic makes it an excellent metal forlow-temperature electrical superconductors.
Niobium alloyed with germanium becomes a superconductor of electricity that does notlose its superconductivity at 23.2° Kelvin as large amounts of electrical current are passedthrough it, as do some other superconductive alloys. In the pure metallic state, niobium wiresare also superconductors when the temperatures are reduced to near absolute zero (–273°C).Niobium alloys are also used to make superconductive magnets as well as jewelry.
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Safety

Symbol(GHS) 
GHS02
Signal word  Danger
Hazard statements  H228
Precautionary statements  P210-P240-P241-P280-P370+P378
Hazard Codes  F,Xi,C
Risk Statements  17-36/37/38-40-34-20/21/22
Safety Statements  17-36-26-6-45-36/37/39-27
RIDADR  UN 1383 4.2/PG 1
WGK Germany  -
RTECS  QT9900000
TSCA  Yes
HazardClass  8
PackingGroup  II
HS Code  8112993090
Toxicity LD50 intraperitoneal in mouse: > 10gm/kg

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