Product Identification

Product Name

m-Dithiane

Synonyms

1,3-Dithiacyclohexane
m-Dithiane

CAS

505-23-7

Formula

C4H8S2

Molecular Weight

120.24

EINECS

208-006-7

RTECS

JO5070000

RTECS Class

Drug; Mutagen

Beilstein/Gmelin

102534

Beilstein Reference

5-19-01-00013

Physical and Chemical Properties

Appearance

Yellow needles.

Solubility in water

Soluble

Melting Point

51 - 54

Boiling Point

207 - 208

Vapor Pressure

0.6 (25 C)

Density

1.36 g/cm3 (25 C)

pKa/pKb

31(at 25℃) (pKa)

Partition Coefficient

.94

Heat Of Vaporization

41.4 kJ/mol

Heat Of Combustion

-3856 kJ/mol

Usage

Used as a protecting group of a carbonyl-containing compound due to its inertness to many conditions.

Refractive Index

1.5981 (25 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. Ingestion

Skin

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

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. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

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

Inhalation

Inhalation of dust may cause respiratory tract irritation.

Skin

No information regarding skin irritation and other potential effects was found.

Eyes

Dust may cause mechanical irritation.

EC Safety Phrase

S 22 24/25

UN (DOT)

1325

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.

Fire Fighting Measures

Flash Point

90

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. 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.

Fire Potential

Flammable/combustible material. May be ignited by friction, heat, sparks or flames.

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, strong bases.

Stability

Stable under normal temperatures and pressures.

Decomposition

Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen sulfide.

Combustion Products

Fire may produce irritating and/or toxic gases.

Transport Information

UN Number

1325

Hazard Class

4.1

Packing Group

II; III

HS Code

2934 99 90