| Identification | More | [Name]
NIOBIUM(V) CHLORIDE | [CAS]
10026-12-7 | [Synonyms]
COLUMBIUM CHLORIDE
COLUMBIUM PENTACHLORIDE
NIOBIUM(+5)CHLORIDE
NIOBIUM CHLORIDE
NIOBIUM PENTACHLORIDE
NIOBIUM(V) CHLORIDE
NbCl5
Niobium chloride (NbCl5)
niobiumchloride(nbcl5)
Niobiumchlorideanhydrousdistilled
Niobiumchloridemetalsbasisyellowxtl
NIOBIUM(V) CHLORIDE, 99.9+% METALS BASIS
NIOBIUM(V) CHLORIDE, 99.995%, ANHYDROUS, POWDER
Niob(V)chloride
Niobium(V) chloride, 99.80%
Niobium(V)chloride(99.99%-Nb)(20-200ppmTa)PURATREM
Niobium(V)chloride(99+%-Nb)
niobium(v) chloride, puratronic
NIOBIUM(V) CHLORIDE: 99.99%, ANHYDROUS, DISTILLED
NIOBIUM(V) CHLORIDE (METALS BASIS) | [EINECS(EC#)]
233-059-8 | [Molecular Formula]
Cl5Nb | [MDL Number]
MFCD00011127 | [Molecular Weight]
270.17 | [MOL File]
10026-12-7.mol |
| Chemical Properties | Back Directory | [Appearance]
yellow fine crystalline powder | [Melting point ]
204.7 °C(lit.)
| [Boiling point ]
254 °C(lit.)
| [density ]
2.75 g/mL at 25 °C(lit.)
| [vapor pressure ]
22.8hPa at 153.8℃ | [Fp ]
248.2°C | [storage temp. ]
no restrictions. | [solubility ]
Soluble in alcohol, hydrochloric acid, carbon tetrachloride and chloroform. | [form ]
powder
| [color ]
Yellow | [Specific Gravity]
2.75 | [Water Solubility ]
Soluble in water, alcohol, HCl, and Carbon tetrachloride. | [Sensitive ]
Moisture Sensitive | [Merck ]
14,6557 | [CAS DataBase Reference]
10026-12-7(CAS DataBase Reference) | [EPA Substance Registry System]
Niobium chloride (NbCl5) (10026-12-7) |
| Safety Data | Back Directory | [Hazard Codes ]
C,Xi | [Risk Statements ]
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed .
R34:Causes burns. | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S27:Take off immediately all contaminated clothing .
S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection . | [RIDADR ]
UN 3260 8/PG 2
| [WGK Germany ]
3
| [RTECS ]
QU0350000
| [F ]
21 | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
III | [HS Code ]
28273985 | [Safety Profile]
Poison by
intraperitoneal route. Moderately toxic by
ingestion. May cause kidney injury. When
heated to decomposition it emits very toxic
fumes of Cl-. See also NIOBIUM and
CHLORIDES. | [Toxicity]
LD50 in mice (mg/kg): 61 i.p., 940 orally (Haley); LD50 in mice, rats (mg/kg): 829, 1400 orally (Zhilova, Kasparov) |
| Hazard Information | Back Directory | [Hazard]
May evolve fumes of hydrogen chloride.
Keep dry | [Chemical Properties]
yellow fine crystalline powder | [Physical properties]
Yellow monoclinic crystals; deliquesces; density 2.75 g/cm3; decomposes in moist air with the evolution of HCl; melts at 204.7°C; vaporizes at 254°C; decomposes in water; soluble in alcohol, hydrochloric acid, chloroform and carbon tetrachloride. | [Uses]
Lewis acid catalyst in organic synthesis. | [Uses]
Used to form mixed chloro-aryloxide compounds, such as [Nb(OC6H3-2,6-i-Pr2)2Cl3]2, which form pyridine or phosphine adducts with a distorted six-coordinate geometry.† | [Preparation]
Niobium pentachloride is obtained as an intermediate during extraction of niobium from its ores (see Niobium). Also, the pentachloride is obtained readily by direct chlorination of niobium metal at 300 to 350°C: 2Nb + 5Cl2 → 2NbCl5
The pentachloride also may be made by chlorination of niobium pentoxide in the presence of carbon at 300°C. The products, however, contain small amounts of niobium oxide trichloride, NbOCl3. | [Flammability and Explosibility]
Nonflammable | [Purification Methods]
It forms yellow, very deliquescent crystals which decompose in moist air to liberate HCl. It should be kept in a dry box flushed with N2 in the presence of P2O5. Wash it with CCl4 and dry it over P2O5. The yellow crystals usually contain a few small, dirty white pellets among the yellow needles. These should be easily picked out. Upon grinding in a dry box, however, they turn yellow. NbCl5 has been sublimed and fractionated in an electric furnace. [Epperson Inorg Synth VII 163 1963, Alexander & Fairbrother J Chem Soc suppl 233 1949.] d2 5 20 pK25 |
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