1,1,1,3,5,5,5-Heptamethyltrisiloxane | CAS No. 1873-88-7

Q: What is 1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7)?

1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) is a silicone-based compound with the chemical formula C12H30Si3O. It is a colorless, viscous liquid characterized by low surface tension, high thermal stability, and non-reactivity. Commonly used as a base for silicone fluids, it exhibits hydrophobic properties and is valued for its inertness in various applications.

Q: What are the main uses of 1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7)?

1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) is widely used in pharmaceuticals as a solvent and emulsifier, in industrial applications for lubricants and coatings, and in food processing as an anti-foaming agent. It also serves as a raw material in research for silicone-based polymers and specialty chemical formulations.

Q: Is 1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) safe?

1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) is generally considered safe with low toxicity. However, handling precautions include avoiding inhalation, skin contact, and ingestion. It is approved for food contact materials and meets safety standards for industrial use, but proper protective equipment and ventilation are recommended during manipulation.

Q: How should 1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) be stored?

1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) should be stored in a cool, dry, and dark location, ideally below 25°C. Keep in sealed, airtight containers made of glass or HDPE to prevent contamination. Avoid exposure to moisture, heat, and direct light to maintain stability and prolong shelf life.

1,1,1,3,5,5,5-Heptamethyltrisiloxane

Basic Information

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CAS Number

1873-88-7

Molecular Formula

C7H22O2Si3

Molecular Weight

222.51 g/mol

Basic Physical Properties

Melting Point

<0°C

Boiling Point

142 °C

Water Solubility

Miscible with acetone, ethanol, diethyl ether. Insoluble in water.

Solubility

Miscible with acetone, ethanol, diethyl ether. Insoluble in water.

Refractive Index

n20/D 1.382(lit.)

Vapor Pressure

2.7±0.3 mmHg at 25°C

SMILES

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C[SiH](O[Si](C)(C)C)O[Si](C)(C)C

InChI

InChI=1S/C7H22O2Si3/c1-10(8-11(2,3)4)9-12(5,6)7/h10H,1-7H3

InChIKey

QNWOFLWXQGHSRH-UHFFFAOYSA-N

LogP

2.5397000000000007

Topological Polar Surface Area

18.46 Å²

Hydrogen Bond Donor/Acceptor

0 / 2

Complexity

121

Safety Information

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Hazard Statement

H225 Highly Flammable liquid and vapor
Flammable liquids

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

Hazard Class

Class 3 Class 3

Stability

Stable. Flammable. Incompatible with strong oxidizing agents.

Sensitiveness

对湿度敏感

Synonyms & References

English

1,1,1,3,5,5,5-Heptamethyltrisiloxane
Heptamethyltrisiloxane, commercial grade (40M40)
Bis(trimethylsiloxy)methylsilane
Methylbis(Trimethylsilyloxy)Silane
Heptamethyltrisiloxane
methyl-bis(trimethylsilyloxy)silicon
H-307 Heptamethyltrisiloxane
(Me3SiO)2MeSiH
(TMSO)2MeSi
1,1,1,3,5,5,5-Heptamethyltrisiloxane(Bis(trimethylsiloxy)methylsilane)
HSi(OSiMe3)2Me
HSi(OSMe3)2Me
HSi(OTMS)2Me
MDHM
Methylpolysilicone
Trisiloxane,1,1,1,3,5,5,5-heptamethyl
Bis(trimethylsiloxy)
40M40,commercialgrade
3H-Heptamethyltrisiloxane
Methylbis(trimethylsiloxy)silane
1,1,1,3,5,5,5-heptamethyl-trisiloxan
Bis-(trimethylsilyloxy)-methylsilane
40M25)
Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-
RVY9659R8C
DSSTox_CID_18795
Methicone (20 CST)
Methicone
Kf 99
DSSTox_RID_82383
DSSTox_RID_79394

MDL Number

MFCD00048000

Customs Code

2934999090

FAQ

What is 1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7)?

1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) is a silicone-based compound with the chemical formula C12H30Si3O. It is a colorless, viscous liquid characterized by low surface tension, high thermal stability, and non-reactivity. Commonly used as a base for silicone fluids, it exhibits hydrophobic properties and is valued for its inertness in various applications.

What are the main uses of 1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7)?

1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) is widely used in pharmaceuticals as a solvent and emulsifier, in industrial applications for lubricants and coatings, and in food processing as an anti-foaming agent. It also serves as a raw material in research for silicone-based polymers and specialty chemical formulations.

Is 1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) safe?

1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) is generally considered safe with low toxicity. However, handling precautions include avoiding inhalation, skin contact, and ingestion. It is approved for food contact materials and meets safety standards for industrial use, but proper protective equipment and ventilation are recommended during manipulation.

How should 1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) be stored?

1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7) should be stored in a cool, dry, and dark location, ideally below 25°C. Keep in sealed, airtight containers made of glass or HDPE to prevent contamination. Avoid exposure to moisture, heat, and direct light to maintain stability and prolong shelf life.