Physical Properties Preparation Reactions
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Tantalum(V) chloride

Physical Properties Preparation Reactions
Product Name
Tantalum(V) chloride
CAS No.
7721-01-9
Chemical Name
Tantalum(V) chloride
Synonyms
TaCl5;TANTALUM CHLORIDE;TANTALUM PENTACHLORIDE;2126087;um(V) chL;JACS-7721-1-9;Tantalum(Ⅴ)chloride;Pentachlorotantalum;TANTALUM(+5)CHLORIDE;TANTALUM(V) CHLORIDE
CBNumber
CB3692046
Molecular Formula
Cl5Ta
Formula Weight
358.21
MOL File
7721-01-9.mol
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Tantalum(V) chloride Property

Melting point:
221 °C
Boiling point:
242 °C
Density 
3.68 g/mL at 25 °C(lit.)
vapor pressure 
69.9hPa at 169.3℃
Flash point:
242°C
storage temp. 
no restrictions.
solubility 
Soluble in ether, carbon tetrachloride, sulfuric acid and potassium hydroxide. Slightly soluble in ethanol.
form 
powder
color 
White to pale yellow
Specific Gravity
3.68
Water Solubility 
Soluble in water (reacts). Also soluble in ethanol, ether and carbon tetrachloride.
Sensitive 
Moisture Sensitive
Merck 
14,9054
InChIKey
OEIMLTQPLAGXMX-UHFFFAOYSA-I
CAS DataBase Reference
7721-01-9(CAS DataBase Reference)
EPA Substance Registry System
Tantalum chloride (TaCl5) (7721-01-9)
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Safety

Hazard Codes 
C
Risk Statements 
22-34
Safety Statements 
26-36/37/39-45
RIDADR 
UN 3260 8/PG 2
WGK Germany 
3
RTECS 
WW5600000
3-10-21
TSCA 
Yes
HazardClass 
8
PackingGroup 
III
HS Code 
28273990
Toxicity
LD50 in rats (mg/kg): 75 i.p.; 1900 orally (Cochran)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H302Harmful if swallowed

H314Causes severe skin burns and eye damage

H335May cause respiratory irritation

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P270Do not eat, drink or smoke when using this product.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
218634
Product name
Tantalum(V) chloride
Purity
99.8% trace metals basis
Packaging
5g
Price
$58.3
Updated
2024/03/01
Sigma-Aldrich
Product number
218634
Product name
Tantalum(V) chloride
Purity
99.8% trace metals basis
Packaging
25g
Price
$170
Updated
2024/03/01
Sigma-Aldrich
Product number
1.12352
Product name
Tantalum(V) chloride
Purity
99+
Packaging
100g
Price
$645.65
Updated
2021/12/16
TCI Chemical
Product number
T2684
Product name
Tantalum(V) Chloride Anhydrous
Purity
>95.0%(T)
Packaging
5g
Price
$58
Updated
2024/03/01
TCI Chemical
Product number
T2684
Product name
Tantalum(V) Chloride Anhydrous
Purity
>95.0%(T)
Packaging
25g
Price
$178
Updated
2024/03/01
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Tantalum(V) chloride Chemical Properties,Usage,Production

Physical Properties

Tantalum(V) chloride, also known as tantalum pentachloride, Yellow monoclinic crystals; hygroscopic; critical temperature 494°C; critical volume 402 cm3/mol; can be sublimed without decomposition in chlorine atmosphere; reacts with water; soluble in ethanol, ether and carbon tetrachloride.

Preparation

Tantalum pentachloride is prepared by heating tantalum metal with excess chlorine:
2Ta + 5Cl2 → 2TaCl5

Reactions

Tantalum pentachloride is hydrolyzed by water to form hydrous tantalum pentoxide, Ta2O5•nH2O and hydrochloric acid:
2TaCl5 + 5H2O → Ta2O5 + 10HCl
Reaction with hydrofluoric acid yields tantalum pentafluoride:
TaCl5 + 5HF → TaF5 + 5HCl
Tantalum pentachloride forms adducts with donor solvent molecules. Also, it forms several complexes and organometallic derivatives.
Reactions with alcohols in the presence of an amine forms dinuclear alkoxides. Thus, with ethanol in the presence of diethylamine, the dinuclear tantalum ethoxide, Ta2(OC2H5)10, is obtained.
Reaction with dimethylzinc forms dichlorotrimethyl tantalum, in which three chlorine atoms are substituted with methyl groups:
2TaCl5 + 3Zn(CH3)2 → 2(CH3)3TaCl2 + 3ZnCl2
Reaction with cyclopentadienyl sodium yields bis(cyclopentadienyl) tantalum trichloride:
TaCl5 + 2C5H5 Na → (C5H5)2TaCl3 + 2NaCl

Chemical Properties

Pale-yellow, crystalline powder; highly reactive. Decomposed by moist air. Soluble in alcohol and potassium hydroxide solution. Keep well stoppered.

Physical properties

Yellow monoclinic crystals; hygroscopic; density 3.68 g/cm3; melts at 216°C; vaporizes at 239.4°C; critical temperature 494°C; critical volume 402 cm3/mol; can be sublimed without decomposition in chlorine atmosphere; reacts with water; soluble in ethanol, ether and carbon tetrachloride.

Uses

Tantalum(V) chloride is used in the preparation of catalyst for the polycyclotrimerizations of alkenediynes, chloro-aryloxide compounds and for the plasma-enhanced atomic layer deposition of tantalum nitride films. It acts as a starting material for new edge-bridged octahedral M6 cluster compounds. It is involved in the preparation of tantalum(V) oxychloride, tantalum pentoxide. It is electrophilic and behaves like a Friedel-Crafts type catalyst, similar to aluminum(III) chloride.

Application

Tantalum(V) chloride is an excellent water soluble crystalline Tantalum source for uses compatible with chlorides.
Used to form mixed chloro-aryloxide compounds, such as [Ta(OC6H3-2,6-i-Pr2)2Cl3]2, which form pyridine or phosphine adducts with a distortedsix-coordinate geometry.
Also used as a starting material for new edge-bridged octahedral M6 cluster compounds such as CsErTa6Cl18, for which electron and stability studies were performed.
Used in the preparation of a simple catalyst for the polycyclotrimerizations of alkenediynes.
Used for the plasma-enhanced atomic layer deposition of tantalum nitride films.

Production Methods

Tantalum pentachloride, TaCl5, forms strongly hydroscopic, needle-shaped white crystals. It is produced on an industrial scale in large tonnage by the chlorination of tantalum scrap or ferrotantalum with NaFeCl4 or by the reductive chlorination of natural ores or synthetic raw materials. High purity TaCl5 is hydrolyzed with steam and thus converted to Ta2O5 of the highest purity. The reduction of TaCl5 with Mg or Al was repeatedly attempted but this thermite-type process never attained any industrial application. TaCl5 is soluble in absolute alcohol, forming the corresponding alkoxides. The alkoxides as well as the chlorides are suitable products for the deposition of tantalum or tantalum pentoxide layers.

Flammability and Explosibility

Non flammable

Safety Profile

Poison by intraperitoneal route. Moderately toxic by ingestion. When heated to decomposition it emits toxic fumes of Cl-.

Purification Methods

Purify it by sublimation in a stream of Cl2. It forms colourless needles when pure (yellow when contaminated with even less than 1% of NbCl5). It is sensitive to H2O; even in conc HCl it decomposes to tantalic acid. It is soluble in EtOH. [Rolsten J Am Chem Soc 80 2952 1958, Brauer in Handbook of Preparative Inorganic Chemistry (Ed Brauer) Academic Press Vol II p 1302 1965.]

Tantalum(V) chloride Preparation Products And Raw materials

Raw materials

Preparation Products

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Tantalum(V) chloride Suppliers

SHANGHAI BANGCHENG CHEMICAL Co.,Ltd.
Tel
021-69106960 13701823733
Fax
021-69106780
Email
13701823733@163.com
Country
China
ProdList
4776
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60
Yurui (Shanghai) Chemical Co., Ltd.
Tel
02150456736 13818239876
Fax
021-50761379
Email
xin@riyngroup.com
Country
China
ProdList
1130
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30
Shanghai Zhuorui Chemical Co.,Ltd.
Tel
021-69180038
Fax
0086-21-39177059
Email
zhuoruichem@163.com
Country
China
ProdList
105
Advantage
58
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
4006608290; 18621169109
Fax
86-21-61259102
Email
market03@meryer.com
Country
China
ProdList
40241
Advantage
62
INTATRADE GmbH
Tel
+49 3493/605464
Fax
+49 3493/605470
Email
sales@intatrade.de
Country
Germany
ProdList
3576
Advantage
66
Alfa Aesar
Tel
400-6106006
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30132
Advantage
84
TCI (Shanghai) Development Co., Ltd.
Tel
021-67121386
Fax
021-67121385
Email
Sales-CN@TCIchemicals.com
Country
China
ProdList
24539
Advantage
81
BeiJing Hwrk Chemicals Limted
Tel
0757-86329057 18501085097
Fax
010-89508210
Email
sales3.gd@hwrkchemical.com
Country
China
ProdList
7508
Advantage
55
Energy Chemical
Tel
021-021-58432009 400-005-6266
Fax
021-58436166
Email
sales8178@energy-chemical.com
Country
China
ProdList
44751
Advantage
61
Sinopharm Chemical Reagent Co,Ltd.
Tel
86-21-63210123
Fax
86-21-63290778 86-21-63218885
Email
sj_scrc@sinopharm.com
Country
China
ProdList
9823
Advantage
79
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View Lastest Price from Tantalum(V) chloride manufacturers

henan kanbei chemical co.,ltd
Product
TANTALUM(V) CHLORIDE 7721-01-9
Price
US $0.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
1000kg
Release date
2022-09-21
Career Henan Chemical Co
Product
TANTALUM(V) CHLORIDE 7721-01-9
Price
US $1.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
200kg
Release date
2019-09-03

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