Product Identification

Product Name

1,1-Diethoxyacetal

Synonyms

1,1-Diethoxyethane
Diethylacetal
Ethylidene diethylether
USAF DO-45

CAS

105-57-7

Formula

C6H14O2

Molecular Weight

118.18

EINECS

203-310-6

RTECS

AB2800000

RTECS Class

Primary Irritant

Merck

13,40

Beilstein/Gmelin

1098310

Beilstein Reference

4-01-00-03103

EC Index Number

605-015-00-1

EC Class

Highly flammable; Irritant

Physical and Chemical Properties

Appearance

Colorless liquid, pungent, green woody solvent odor.

Solubility in water

Miscible

Melting Point

-100

Boiling Point

102.7

Vapor Pressure

28

Density

0.8461 g/cm3 (0 C)

Partition Coefficient

.84

Heat Of Vaporization

42.30 kJ/mol

Usage

Solvent, in organic syntheses, formerly hypnotic.

Vapor Density

4.08

Saturation Concentration

2.6 x 10(4) ppm (2.6%) at 20 C (calculated)

Refractive Index

1.38 (20 C)

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.

Inhalation

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Skin

Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

Eyes

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage

Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Regularly check inhibitor levels to maintain peroxide levels below 1%. Storage under a nitrogen blanket has been recommended. After opening, purge container with nitrogen before reclosing. Periodically test for peroxide formation on long-term storage. Addition of water or appropriate reducing materials will lessen peroxide formation.

Handling

Wash thoroughly after handling. Use with adequate ventilation. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. If peroxide formation is suspected, do not open or move container. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.

Hazards Identification

Inhalation

May cause respiratory tract irritation. May cause drowsiness, unconsciousness, and central nervous system depression. Vapors may cause dizziness or suffocation.

Skin

Causes skin irritation.

Eyes

Causes eye irritation.

Ingestion

May cause irritation of the digestive tract.

Hazards

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. May react with oxygen to form explosive peroxides. Old samples may explode on heating.

EC Risk Phrase

R 11 36/38

EC Safety Phrase

S 9 16 33

UN (DOT)

1088

Exposure Controls/Personal Protection

Personal Protection

Eyes: 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 appropriate protective clothing to prevent skin exposure.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Exposure Effects

The toxological properties of this substance have not been fully investigated.

Poison Class

4

Fire Fighting Measures

Flash Point

-21

Autoignition

230

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Use water spray to keep fire-exposed containers cool. Extremely flammable liquid. Extinguishing media: Use water spray to cool fire-exposed containers. Use agent most appropriate to extinguish fire. For large fires, use water spray, fog or alcohol-resistant foam. Do NOT use straight streams of water. For small fires, use carbon dioxide, dry chemical, dry sand, or alcohol-resistant foam. Cool containers with flooding quantities of water until well after fire is out.

Upper exp. limit

10.4

Lower exp. limit

1.6

Fire Potential

Dangerous, due to fire and explosion hazards. Dangerous, when exposed to heat or flame

Accidental Release Measures

Small spills/leaks

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition. A vapor suppressing foam may be used to reduce vapors. Water spray may reduce vapor but may not prevent ignition in closed spaces.

Stability and Reactivity

Disposal Code

1

Incompatibilities

Oxidizing agents.

Stability

Stable under normal temperatures and pressures. Distillation may lead to the formation of peroxides. Forms heat-sensitive explosive peroxides on contact with air.

Decomposition

Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Combustion Products

Explosive In fire, may decompose to form flammable or explosive mixtures in air.

Transport Information

UN Number

1088

Hazard Class

3

Packing Group

II

HS Code

2911 00 00