Basic information
- Name:
Trimethoxymethane
- Superlist Name:
- Trimethyl orthoformate
- CAS No.:
149-73-5
- Molecular Structure:
- Formula:
- C4H10O3
- Molecular Weight:
- 106.14
- Deleted CAS:
- 251301-35-6
- Synonyms:
- Methyl orthoformate;Orthoformic acid trimethyl ester;Orthoformic acid methyl ester;Orthomravencan methylnaty;Methylester kyseliny orthomravenci;
- EINECS:
- 205-745-7
- Density:
- 0.93 g/cm3
- Melting Point:
- -53 °C
- Boiling Point:
- 104 °C at 760 mmHg
- Flash Point:
- 15.6 °C
- Solubility:
- water: 10 g/L (hydrolysis)
- Appearance:
- Colorless transparent liquid
- Hazard Symbols:
F,
Xi- Risk Codes:
- 11-36
- Safety Description:
- 9-16-26-29 Details
- Transport Information:
- UN 3272 3/PG 2
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Chemistry
Product Name: Trimethyl Orthoformate
CAS No: 149-73-5
Formula: C4H10O3
Molecular Weight: 106.12
Appearance: Colorless liquid
mp : -53 °C
bp : 101-102 °C(lit.)
density : 0.97 g/mL at 25 °C(lit.)
vapor density : 3.67 (vs air)
vapor pressure : 23.5 mm Hg ( 20 °C)
refractive index : n20/D 1.379(lit.)
Fp : 60 °F
storage temp: Store at RT
Water Solubility : 10 g/L (hydrolysis)
Sensitive : Moisture Sensitive
IUPAC: trimethoxymethane
Product Categories: straight chain compounds;Orthoesters
Synonyms: Methyl orthoformate ; Tmof ; Orthoformic acid trimethyl ester ; Trimethyl-o-formate ; Trimethoxymethane ; Ch(och3)3 ; Methane,trimethoxy-
Toxicity Data With Reference
Ingestion: The toxicological properties of this substance have not been fully investigated. Expected to be a low ingestion hazard. Causes gastrointestinal tract irritation.
Inhalation: Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated. Vapors may cause dizziness or suffocation.
Skin: Causes mild skin irritation.
Eyes: Causes moderate eye irritation. The toxicological properties of this material have not been fully investigated.
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Safety Profile
Hazard Codes: 
Xi
F
Risk Statements: 11-36
R11: Highly flammable
R36: Irritating to eyes
Safety Statements: 9-16-26-29
S9: Keep container in a well-ventilated place
S16: Keep away from sources of ignition
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S29: Do not empty into drains
RIDADR: UN 3272 3/PG 2
WGK Germany: 1
RTECS: RM6650000
HazardClass: 3
PackingGroup: II
HS Code: 29159080
Specification
Fire Fighting:Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Do NOT use water directly on fire. Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water.
Personal Protection:Eyes: Wear chemical goggles. Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear a chemical apron. Wear appropriate protective clothing to prevent skin exposure.