Product Identification

Product Name

BOZ

Synonyms

2-Butyne-1,4-diol
But-2-yne-1,4-diol
Butynediol

CAS

110-65-6

Formula

C4H6O2

Molecular Weight

86.09

EINECS

203-788-6

RTECS

ES0525000

RTECS Class

Tumorigen; Reproductive Effector

Beilstein/Gmelin

1071237

Beilstein Reference

4-01-00-02687

EC Index Number

603-076-00-9

EC Class

Toxic; Harmful; Corrosive

Physical and Chemical Properties

Appearance

White to light-brown solid or brownish-yellow aqueous solution.

Solubility in water

Very soluble

Melting Point

55 - 58

Boiling Point

238

Vapor Pressure

0.008 (25 C)

Density

1.1001 g/cm3 (20 C)

pKa/pKb

12.72 (pKa)

Partition Coefficient

-1.1

Heat Of Vaporization

55.2 kJ/mol

Heat Of Combustion

-2204 kJ/mol

Usage

Intermediate, corrosion inhibitor, electroplating brightener, defoliant, polymerization accelerator, stabilizer for chlorinated hydrocarbons, cosolvent for paintermediate & varnish removal.

Refractive Index

1.4804 (20 C)

First Aid Measures

Ingestion

Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.

Inhalation

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

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

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

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.

Handling

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

Hazards Identification

Inhalation

Can produce delayed pulmonary edema. Causes respiratory tract irritation with possible burns.

Skin

May cause dermatitis. Causes severe skin irritation and possible burns.

Eyes

Causes eye irritation and possible burns. May cause chemical conjunctivitis.

Ingestion

Harmful if swallowed. Causes digestive tract irritation with possible burns.

Hazards

When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. May polymerize explosively when heated or involved in a fire. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.

EC Risk Phrase

R 21 23/25 34 48/22

EC Safety Phrase

S 26 36/37/39 45

UN (DOT)

2716

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 neoprene gloves, apron, and/or clothing. Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear neoprene gloves, apron, and/or clothing. Wear appropriate protective clothing to prevent skin exposure.

Respirators

A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.

Exposure Effects

Prolonged or repeated skin contact may cause dermatitis. Effects may be delayed.

Poison Class

3

Fire Fighting Measures

Flash Point

152

Autoignition

410

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. Combustible material; may burn but does not ignite readily. Extinguishing media: Do NOT get water inside containers. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.

Upper exp. limit

35.7

Lower exp. limit

2.3

Fire Potential

May burn but does not ignite readily.

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation. Do not get water inside containers.

Stability and Reactivity

Disposal Code

9

Stability

Stable at room temperature in closed containers under normal storage and handling conditions.

Incompatibilities

Strong acids, strong bases.

Decomposition

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

Combustion Products

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

Transport Information

UN Number

2716

Hazard Class

6.1

Packing Group

III

HS Code

2905 39 80