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Tris(trimethylsilyl)phosphate

Tris(trimethylsilyl)phosphate structure

CAS No.: 10497-05-9

Chemical Name:: Tris(trimethylsilyl)phosphate

Synonyms: Silanol, trimethyl-, phosphate (3:1);TRIS(TRIMETHYLSILYL) PHOSPHATE;DK028;TIMTEC-BB SBB001292;Phosphoric acid, TMS;Phosphoric acid, triTMS;Trimethylsilane phosphate;Phosphoric acid, tris-TMS;Tris-(trimethylsilyl)fosfat;tritrimethylsilyl phosphate

CBNumber:: CB3713871

Molecular Formula:: C9H27O4PSi3

Molecular Weight:: 314.54

MDL Number:: MFCD00008267

MOL File:: 10497-05-9.mol

MSDS File:: SDS

Last updated:2025-09-24 14:33:23

Product description	Number	Pack Size	Price
Tris(trimethylsilyl) phosphate ≥99.0%, anhydrous, battery grade	935638	1 unit	$190
Tris(trimethylsilyl) phosphate ≥98%	275794	5g	$80.7
Tris(trimethylsilyl) Phosphate >98.0%(GC)	P1248	5g	$54
Tris(trimethylsilyl) Phosphate >98.0%(GC)	P1248	25g	$179
Tris(trimethylsilyl) Phosphate 97%	A962485	5g	$13
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Tris(trimethylsilyl)phosphate Properties

Melting point	3-4 °C (lit.)
Boiling point	228-229 °C/720 mmHg (lit.)
Density	0.945 g/mL at 25 °C (lit.)
vapor pressure	23.3hPa at 20℃
refractive index	n20/D 1.409(lit.)
Flash point	76 °F
storage temp.	under inert gas (nitrogen or Argon) at 2-8°C
pka	23-25(at 25℃)
form	liquid
Specific Gravity	0.959
color	Colorless to Light yellow to Light orange
Water Solubility	935.5μg/L at 20℃
Hydrolytic Sensitivity	8: reacts rapidly with moisture, water, protic solvents
BRN	1794624
LogP	4.72 at 20℃
CAS DataBase Reference	10497-05-9(CAS DataBase Reference)
EPA Substance Registry System	Silanol, trimethyl-, phosphate (3:1) (10497-05-9)
UNSPSC Code	12352100
NACRES	NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS02,GHS07

Signal word

Danger

Hazard statements

H225-H315-H319-H335

Precautionary statements

P210-P302+P352-P305+P351+P338

Hazard Codes

F,Xi

Risk Statements

11-36/37/38

Safety Statements

16-26-36

RIDADR

UN 1993 3/PG 2

WGK Germany

RTECS

TC9700000

10-21

TSCA

Yes

HS Code

2931.90.9010

HazardClass

3.2

PackingGroup

III

NFPA 704

	3
2		0

Tris(trimethylsilyl)phosphate price More Price(7)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	935638	Tris(trimethylsilyl) phosphate ≥99.0%, anhydrous, battery grade	10497-05-9	1 unit	$190	2025-07-31	Buy
Sigma-Aldrich	275794	Tris(trimethylsilyl) phosphate ≥98%	10497-05-9	5g	$80.7	2025-07-31	Buy
TCI Chemical	P1248	Tris(trimethylsilyl) Phosphate >98.0%(GC)	10497-05-9	5g	$54	2025-07-31	Buy
TCI Chemical	P1248	Tris(trimethylsilyl) Phosphate >98.0%(GC)	10497-05-9	25g	$179	2025-07-31	Buy
Ambeed	A962485	Tris(trimethylsilyl) Phosphate 97%	10497-05-9	5g	$13	2021-12-16	Buy

Product number	Packaging	Price	Buy
935638	1 unit	$190	Buy
275794	5g	$80.7	Buy
P1248	5g	$54	Buy
P1248	25g	$179	Buy
A962485	5g	$13	Buy

Tris(trimethylsilyl)phosphate Chemical Properties,Uses,Production

Chemical Properties

Colorless liquid

Uses

Tris(trimethylsilyl) phosphite (TMSPi) is a film-forming additive for high voltage cathode material in lithium-ion batteries. Tris (trimethylsilyl) phosphate is cleaved by alkali-metal fluorides, nitrates, and acetates at give the trimethylsilyl esters of the corresponding acids.

Definition

ChEBI: Tris(trimethylsilyl) phosphate is an organosilicon compound that is phosphoric acid in which the three hydroxy groups are substituted by (trimethylsilyl)oxy groups. It is a phosphoric acid derivative and an organosilicon compound.

Preparation

Tris(trimethylsilyl)phosphine is prepared by treating trimethylsilyl chloride, white phosphorus, and sodium-potassium alloy:
1/4 P4 + 3 Me3SiCl + 3 K → P(SiMe3)3 + 3 KCl

General Description

Tris(trimethylsilyl) phosphate has been investigated as a novel film-forming additive for LiNi_0.5Co_0.2Mn_0.3O₂cycling at high cut-off potential in LiPF₆-based electrolyte. Tris(trimethylsilyl) phosphate [Tris(trimethylsilyl) ester of phosphoric acid] undergoes dealkylsilylation reaction with alumazene to yield heteroadamantane molecule.

Reactivity Profile

Tris(trimethylsilyl)phosphine and its more reactive derivative lithium bis-(trimethylsilyl)phosphide·2tetrahydrofuran are very useful reagents for the preparation of compounds with a single or a multiple element phosphorus bond. They react readily with various element halides, with carboxylic acid chlorides, and with carboxylic esters, as well as with other organic electrophiles via a substitution of lithium and/or a cleavage of the weak polar Si-P bonds.

Flammability and Explosibility

Not classified

Synthesis

75-77-4

10497-05-9

General procedure for the synthesis of tris(trimethylsilyl)phosphorus from trimethylchlorosilane: In a 1000 ml three-necked flask equipped with a thermometer and a reflux condenser, 352 g (3.24 mol) of trimethylchlorosilane and 115 g (1 mol) of ammonium dihydrogen phosphate were added. The reaction mixture was heated to 78 °C under stirring conditions and maintained for 3 hours. After completion of the reaction, the reaction mixture was filtered and the resulting filtrate was the crude product of tris(trimethylsilyl) phosphate. Subsequently, the crude product was subjected to vacuum distillation and the fraction at 125-128 °C/30 mmHg was collected to obtain 282 g of tris(trimethylsilyl) phosphate in 89.6% yield. Throughout the reaction, an exhaust gas absorption unit needs to be connected to the outlet of the reflux condenser to absorb the hydrogen chloride gas generated in the reaction with water.

References

[1] Inorganic Chemistry, 2018, vol. 57, # 15, p. 9348 - 9353
[2] Patent: CN105949233, 2016, A. Location in patent: Paragraph 0018; 0019; 0021; 0023; 0025; 0027; 0029
[3] Zhurnal Obshchei Khimii, 1957, vol. 27, p. 1476,1479, 1480; engl.Ausg.S. 1550, 1553
[4] Journal of Organometallic Chemistry, 2014, vol. 749, p. 197 - 203
[5] Inorganic Chemistry, 2017, vol. 56, # 17, p. 10699 - 10705

Tris(trimethylsilyl)phosphate synthesis

Synthesis of Tris(trimethylsilyl)phosphate from Chlorotrimethylsilane

Tris(trimethylsilyl)phosphate Preparation Products And Raw materials

Raw materials

Chlorotrimethylsilane

Preparation Products

Tris(trimethylsilyl)phosphate Suppliers

Global( 291)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Milestone Chemical Wuxi Co.,Ltd	18068271528	sales@milestonechem.com	China	9	58
Hebei Yanxi Chemical Co., Ltd.	+8618531123677	faithe@yan-xi.com	China	5853	58
Hebei Chuanghai Biotechnology Co., Ltd	+8615531151365	mina@chuanghaibio.com	China	18126	58
ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD	+86-13017695106 +86-13676922317	jiuyitime@fdachem.com	China	16513	58
Shanghai Daken Advanced Materials Co.,Ltd	+86-2158073036	info@dakenam.com	China	13493	58
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21614	55
Hangzhou FandaChem Co.,Ltd.	008657128800458; +8615858145714	FandaChem@Gmail.com	China	1396	55
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	29847	58
Win-Win Chemical CO., Limited	0086-577-64498589	sales@win-winchemical.com	CHINA	998	58

Supplier	Advantage
Milestone Chemical Wuxi Co.,Ltd	58
Hebei Yanxi Chemical Co., Ltd.	58
Hebei Chuanghai Biotechnology Co., Ltd	58
ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD	58
Shanghai Daken Advanced Materials Co.,Ltd	58
Henan Tianfu Chemical Co.,Ltd.	55
Hangzhou FandaChem Co.,Ltd.	55
ATK CHEMICAL COMPANY LIMITED	60
career henan chemical co	58
Win-Win Chemical CO., Limited	58

View Lastest Price from Tris(trimethylsilyl)phosphate manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2025-12-06	Tris(trimethylsilyl) phosphate 10497-05-9	US $5.00 / KG	1KG	99%	200mt/year	Jinan Finer Chemical Co., Ltd
2025-12-01	Tris(triMethylsilyl) Phosphate 10497-05-9	US $0.00-0.00 / KG	1KG	98.0%	10000KGS	Shaanxi Dideu New Materials Co. Ltd
2025-10-13	Tris(Trimethylsilyl) Phosphate 10497-05-9	US $1.10-9.90 / kg	1kg	99%min	100kg	ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD

Tris(trimethylsilyl) phosphate
10497-05-9
US $5.00 / KG
99%
Jinan Finer Chemical Co., Ltd

Tris(triMethylsilyl) Phosphate
10497-05-9
US $0.00-0.00 / KG
98.0%
Shaanxi Dideu New Materials Co. Ltd

Tris(Trimethylsilyl) Phosphate
10497-05-9
US $1.10-9.90 / kg
99%min
ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD

Tris(trimethylsilyl)phosphate Spectrum

Tris(trimethylsilyl)phosphate(10497-05-9)MS Tris(trimethylsilyl)phosphate(10497-05-9)¹HNMR Tris(trimethylsilyl)phosphate(10497-05-9)¹³CNMR Tris(trimethylsilyl)phosphate(10497-05-9)IR1 Tris(trimethylsilyl)phosphate(10497-05-9)Raman

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