Product Identification

Product Name

HD-M

Synonyms

2,5-Dimethyl-3-hexyne-2,5-diol
2,5-dimethylhex-3-yne-2,5-diol
Tetramethyl-2-butynediol

CAS

142-30-3

Formula

C8H14O2

Molecular Weight

142.19999999999999

EINECS

205-533-4

RTECS

MR0176000

RTECS Class

Drug

Beilstein/Gmelin

969835

Beilstein Reference

4-01-00-02699

EC Class

harmful

Physical and Chemical Properties

Appearance

Very light yellow, crystalline flakes.

Solubility in water

Soluble

Melting Point

93 - 95

Boiling Point

205

Vapor Pressure

0.06 (25 C)

Density

0.9469 g/cm3 (20 C)

pKa/pKb

12.90 (pKa)

Partition Coefficient

.26

Heat Of Vaporization

51.3 kJ/mol

Usage

Wire-drawing lubricant, antifoaming agent, coupling agent in resin coatings, chemical intermediate.

Refractive Index

1.4545 (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. Wash clothing before reuse.

Eyes

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 container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.

Hazards Identification

Inhalation

May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.

Skin

May cause skin irritation.

Eyes

May cause eye irritation.

Ingestion

May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.

EC Risk Phrase

R 21/22 43

EC Safety Phrase

S 36/37

UN (DOT)

3335

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 toxicological properties of this material have not been investigated.

Poison Class

4

Fire Fighting Measures

Flash Point

86

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.

Lower exp. limit

1.2

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Disposal Code

3

Incompatibilities

Oxidizing agents.

Stability

Stable under normal temperatures and pressures.

Decomposition

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

Transport Information

UN Number

3335

HS Code

2905 39 80