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Bis(trimethylsilyl)acetylene

Bis(trimethylsilyl)acetylene Structure
Bis(trimethylsilyl)acetylene structure
CAS No.
14630-40-1
Chemical Name:
Bis(trimethylsilyl)acetylene
Synonyms
BTMSA;1,2-Bis(trimethylsilyl)ethyne;BSTMA;Bis(trimethylsilyl)ethyne;1,2-BIS-TRIMETHYLSILANYL-ETHYNE;DK079;DK080;ICLA-002;TIMTEC-BB SBB008997;Ethynylbistrimethylsilanel
CBNumber:
CB4376321
Molecular Formula:
C8H18Si2
Molecular Weight:
170.4
MDL Number:
MFCD00008276
MOL File:
14630-40-1.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-05-28 01:33:13
Product description Number Pack Size Price
Bis(trimethylsilyl)acetylene 99% 187437 10g $72
Bis(trimethylsilyl)acetylene 99% 187437 50g $253
Bis(trimethylsilyl)acetylene >97.0%(GC) B1090 5g $87
Bis(trimethylsilyl)acetylene >97.0%(GC) B1090 25g $262
Bis(trimethylsilyl)acetylene, min. 97% 14-1000 10g $71
More product size
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Bis(trimethylsilyl)acetylene Properties

Melting point 21-24 °C(lit.)
Boiling point 136-137 °C(lit.)
Density 0.752 g/mL at 25 °C(lit.)
refractive index n20/D 1.427(lit.)
Flash point 29 °C
storage temp. 2-8°C
solubility soluble in Chloroform, Methanol
form liquid
Specific Gravity 0.770
color colorless
Water Solubility MAY DECOMPOSE
Hydrolytic Sensitivity 2: reacts with aqueous acid
BRN 906870
InChI 1S/C8H18Si2/c1-9(2,3)7-8-10(4,5)6/h1-6H3
InChIKey ZDWYFWIBTZJGOR-UHFFFAOYSA-N
SMILES C[Si](C)(C)C#C[Si](C)(C)C
CAS DataBase Reference 14630-40-1(CAS DataBase Reference)
NIST Chemistry Reference Silane, 1,2-ethynediylbis[trimethyl-(14630-40-1)
EPA Substance Registry System Silane, 1,2-ethynediylbis[trimethyl- (14630-40-1)
UNSPSC Code 12352100
NACRES NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)  Flame (GHS02)Exclamation Mark (GHS07)
GHS02,GHS07
Signal word  Danger
Hazard statements  H225-H315-H319-H335
Precautionary statements  P210-P302+P352-P305+P351+P338
target organs Respiratory system
PPE Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
Hazard Codes  F,Xi
Risk Statements  11-36/37/38-10
Safety Statements  16-26-36
RIDADR  UN 1993 3/PG 2
WGK Germany  3
F  10
TSCA  TSCA listed
HazardClass  3
PackingGroup  III
HS Code  29310095
Storage Class 3 - Flammable liquids
Hazard Classifications Eye Irrit. 2
Flam. Liq. 2
Skin Irrit. 2
STOT SE 3
Limited Quantities 1.0 L (0.3 gallon) (liquid)
Excepted Quantities Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)
NFPA 704
3
0 0

Bis(trimethylsilyl)acetylene price More Price(99)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 187437 Bis(trimethylsilyl)acetylene 99% 14630-40-1 10g $72 2026-04-30 Buy
Sigma-Aldrich 187437 Bis(trimethylsilyl)acetylene 99% 14630-40-1 50g $253 2026-04-30 Buy
TCI Chemical B1090 Bis(trimethylsilyl)acetylene >97.0%(GC) 14630-40-1 5g $87 2026-04-30 Buy
TCI Chemical B1090 Bis(trimethylsilyl)acetylene >97.0%(GC) 14630-40-1 25g $262 2026-04-30 Buy
Strem Chemicals 14-1000 Bis(trimethylsilyl)acetylene, min. 97% 14630-40-1 10g $71 2024-03-01 Buy
Product number Packaging Price Buy
187437 10g $72 Buy
187437 50g $253 Buy
B1090 5g $87 Buy
B1090 25g $262 Buy
14-1000 10g $71 Buy

Bis(trimethylsilyl)acetylene Chemical Properties,Uses,Production

Chemical Properties

clear colorless liquid after melting

Uses

In the presence of CpCo(CO)2 (cat. no. 245259), undergoes cycloaddition with 1,5-hexadiynes to form benzocyclobutenes.1

Uses

BTMSA is used as starting reagent in the synthesis of functionalized 4-R-1,2-bis(trimethylsilyl)benzenes. It is also used in the synthesis of (+)-brasilenyne2 and (β-diketanato)Ag(BTMSA). Bis(trimethylsilyl)acetylene is a ligand that binds to a central metal ion (e.g. Titanium) to create a coordination complex. One of its complexes, Permethyltitanocene-bis(trimethylsilyl)acetylene, is a catalyst for the head-to-tail dimerization of 1-alkynes (e.g. 3-Penten-1-yne [P227430]).

General Description

Bis(trimethylsilyl)acetylene (BTMSA) participates as nucleophile in Friedel-Crafts type acylations and alkylations. BTMSA undergoes rhodium catalyzed addition reaction with diarylacetylenes. It undergoes cycloaddition with 1,5-hexadiynes in the presence of CpCo(CO)2 (Cp=cyclopentadienyl) to form benzocyclobutenes. Structure of BTMSA was characterized by a centre of inversion present on triple bond (length=1.208(3)). TiCl4-Et2AlCl catalyzed Diels-Alder reaction of BTMSA with norbornadiene has been reported.

Synthesis

Di(trimethylmethylsilyl)acetylene can be synthesized by the following steps:

1 With acetylene dimetallic salt and trimethyl halosilane as raw materials, acetylene dimetallic salt and trimethyl halosilane molar mass ratio of 1:2.0~1:2.2, first suspended in toluene, dropwise addition of trimethyl halosilane, dropwise addition, warming up to 50~60 C reaction for 2 hours, in which the acetylene Dimetallic salt is disodium acetylene or dilithium acetylene;

2 Terminate the reaction with water, after extraction, drying, concentration under reduced pressure, distillation under reduced pressure, to obtain bis(trimethylsilyl)acetylene with purity of more than 99% and yield of more than 90%.

Purification Methods

Dissolve it in pet ether and wash it with ice-cold dilute HCl. The pet ether extract is dried (MgSO4), evaporated and fractionated at 760mm. [Walton & Waugh J Organomet Chem 37 45 1972, Beilstein 4 IV 3950.]

Bis(trimethylsilyl)acetylene synthesis

75-77-4
74-86-2
14630-40-1
Synthesis of Bis(trimethylsilyl)acetylene from Chlorotrimethylsilane and Acetylene

Bis(trimethylsilyl)acetylene Preparation Products And Raw materials

Raw materials

Chlorotrimethylsilane Tetrahydrofuran Copper(I) chloride Acetylene Bromoethane
Magnesium

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Preparation Products

4,4'-DIFLUORODIPHENYLACETYLENE TRANS,TRANS,CIS-1,5,9-CYCLODODECATRIENE Lincomycin 2,7-diacetate Trimethyl(phenoxy)silane Phenyl[4-(trimethylsilyl)thiophen-3-yl]iodonium Trifluoromethanesulfonate
Pent-4-yn-3-one, 2-methyl-

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Bis(trimethylsilyl)acetylene Suppliers

Global( 315)Suppliers
Supplier Tel Email Country ProdList Advantage
ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD 		+86-13017695106 +86-13676922317 jiuyitime@fdachem.com China 16512 58
Capot Chemical Co.,Ltd. 		+86-（0）57185586718 +86-13336195806 sales@capot.com China 29640 60
Shanghai Daken Advanced Materials Co.,Ltd 		+86-2158073036 info@dakenam.com China 13901 58
Henan Tianfu Chemical Co.,Ltd. 		+86-0371-55170693 +86-19937530512 info@tianfuchem.com China 21587 55
Nanjing ChemLin Chemical Industry Co., Ltd. 		025-83697070 product@chemlin.com.cn CHINA 3009 60
ATK CHEMICAL COMPANY LIMITED 		+undefined-21-51877795 ivan@atkchemical.com China 33024 60
career henan chemical co 		+86-0371-86658258 +8613203830695 sales@coreychem.com China 29815 58
Win-Win Chemical CO., Limited 		0086-577-64498589 sales@win-winchemical.com CHINA 998 58
Xiamen AmoyChem Co., Ltd 		+86-86-5926051114 +8615060885618 sales@amoychem.com China 6366 58
Alchem Pharmtech,Inc. 		8485655694 sales@alchempharmtech.com United States 63687 58
Supplier Advantage
ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD 		58
Capot Chemical Co.,Ltd. 		60
Shanghai Daken Advanced Materials Co.,Ltd 		58
Henan Tianfu Chemical Co.,Ltd. 		55
Nanjing ChemLin Chemical Industry Co., Ltd. 		60
ATK CHEMICAL COMPANY LIMITED 		60
career henan chemical co 		58
Win-Win Chemical CO., Limited 		58
Xiamen AmoyChem Co., Ltd 		58
Alchem Pharmtech,Inc. 		58

View Lastest Price from Bis(trimethylsilyl)acetylene manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Bis(trimethylsilyl)acetylene pictures 2026-04-17 Bis(trimethylsilyl)acetylene
14630-40-1
 $3.00-9.00 99% ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD
Bis(trimethylsilyl)acetylene pictures 2025-04-04 Bis(trimethylsilyl)acetylene
14630-40-1
 1KG 98% 1ton Henan Aochuang Chemical Co.,Ltd.
Bis(trimethylsilyl)acetylene pictures 2021-07-13 Bis(trimethylsilyl)acetylene
14630-40-1
 $10.00-15.00 1KG 99%+ HPLC Zhuozhou Wenxi import and Export Co., Ltd

Bis(trimethylsilyl)acetylene Spectrum

Bis(trimethylsilyl)acetylene(14630-40-1)MSBis(trimethylsilyl)acetylene(14630-40-1)1HNMRBis(trimethylsilyl)acetylene(14630-40-1)IR1Bis(trimethylsilyl)acetylene(14630-40-1)Raman

14630-40-1(Bis(trimethylsilyl)acetylene)Related Search:

Bis(trimethylsilyl)sulfate BIS(TRIMETHYLSILYLMETHYL)AMINE BIS(TRIMETHYLSILYLMETHYL)DICHLOROSILANE BIS(PHENYLETHYNYL)DIMETHYLSILANE 1,4-BIS(TRIMETHYLSILYL)-1,3-BUTADIYNE
BIS(DIETHYLAMINO)DIMETHYLSILANE bis(4-broMophenyl)-diphenyl-silane bis(4-broMophenyl)diMethylsilane BIS(TRICHLOROSILYLETHYL)BENZENE,TECH-95 BIS(METHYLDIETHOXYSILYLPROPYL)AMINE
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(TRIMETHYLSILYL)ACETYLENE-13C2 [BIS(TRIMETHYLSILYL)ACETYLENE](HEXAFLUOROACETYLACETONATO)COPPER(I) Bis(trimethylsilyl)acetylene-bis(cyclopentadienyl)(pyridine)zirconium,Bis(cyclopentadienyl)zirconium bis(trimethylsilyl)acetylene pyridine complex

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BIS(TRIMETHYLSILYL)ACETYLENE BSTMA Bis(trimethylsilyl)acetylene 99% 1,2-BIS-TRIMETHYLSILANYL-ETHYNE TIMTEC-BB SBB008997 ICLA-002 1,2-Bis(trimethylsilyl)acetylene 1,2-ethynediylbis[trimethyl-silan 1,2-ethynediylbis[trimethyl-Silane 2,5-Disilahex-3-yne, 2,2,5,5-tetramethyl- Acetylene, bis(trimethylsilyl)- Bis(trimethylsilyl)ethyne Silane, 1,2-ethynediylbis*trimethyl- Trimethyl[(trimethylsilyl)ethynyl]silane BIS-(TRIMETHYLSILYL)ACETYLENE, 98%BIS-(TRIMETHYLSILYL)ACETYLENE, 98%BIS-(TRIMETHYLSILYL)ACETYLENE, 98% Bis(trimethylsilyl)acetylene(BTMSA) Bis(trimethylsilyl)acetylene,min.97% 5-Fluoro-2-methoxy-phenylamine Bis(trimethylsilyl)acetylene, min. 97% Bis(triMethylsilyl)acetylene, 99% 50GR Ethynylbistrimethylsilanel Bis(trimethylsilyl)acetylene,99% Silane,1,1'-(1,2-ethynediyl)bis[1,1,1-triMethyl- Bis(trimethylsilyl)acetylene > Bis(trimethylsilyl)acetylene, 98%, for synthesis TIANFU-CHEM Bis(trimethylsilyl)acetylene 14630-40-1 3-Metbis(Trimethylsilyl) Acetylene Double (trimethylmethsilyl) acetylene DK079 DK080 N-butyl-N,N',N'-trimethylsulfamide Bis(trimethylsilyl)acetylene - [B47211] Bis(trimethylsilyl)acetylene1 1,2-Bis(trimethylsilyl)ethyne BTMSA 14630-40-1 C8H18Si2 CH33SiCCSiCH33 CH33SiC8801CSiCH33 Building Blocks Alkynes Organic Building Blocks Internal Ethynylsilanes Si-(C)4 Compounds Acetylenes Functionalized Acetylenes Silicon Compounds (for Synthesis) Si (Classes of Silicon Compounds) Alkynes Building Blocks Chemical Synthesis Internal Organic Building Blocks organosilicon compounds Industrial/Fine Chemicals Acetylenes Ethynylsilanes