Product Identification

Product Name

3-Hexyn-2,5-diol

Synonyms

3-Hexyn-2,5-diol
Hex-3-yne-2,5-diol

CAS

3031-66-1

Formula

C6H10O2

Molecular Weight

114.16

EINECS

221-209-5

RTECS

MR0175000

RTECS Class

Other

Beilstein/Gmelin

1720667

Beilstein Reference

3-01-00-02271

Physical and Chemical Properties

Solubility in water

Very soluble

Melting Point

42

Boiling Point

222

Vapor Pressure

0.02 (25 C)

Density

1.023 g/cm3 (13 C)

pKa/pKb

12.8 (pKa)

Heat Of Vaporization

53.3 kJ/mol

Refractive Index

1.4698 (13 C)

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.

Skin

Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.

Eyes

Immediately flush with running water for at least 20 minutes.

Handling and Storage

Storage

Keep tightly closed. Store in a cool dry place.

Hazards Identification

Inhalation

TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Effects of contact or inhalation may be delayed.

Skin

Contact with molten substance may cause severe burns to skin and eyes. See Inhalation.

Eyes

See Inhalation.

Ingestion

See Inhalation.

Hazards

Contact with metals may evolve flammable hydrogen gas.

EC Risk Phrase

25 36

EC Safety Phrase

26 36/37/39 45

UN (DOT)

2811

Exposure Controls/Personal Protection

Personal Protection

Rubber gloves. Chemical safety goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Exposure Effects

Irritant. Irritating to eyes, respiratory system and skin.

Poison Class

3

Fire Fighting Measures

Flash Point

104

Autoignition

280

Fire Fighting

Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.

Fire Potential

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Accidental Release Measures

Small spills/leaks

ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.

Stability and Reactivity

Incompatibilities

Strong oxidizing agents, Strong acids, Acid chlorides, Acid anhydrides.

Decomposition

Carbon monoxide, Carbon dioxide.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

2811

Hazard Class

6.1