Product Identification

Product Name

4-Dithiane-2,5-diol

Synonyms

2,5-Dihydroxy-1,4-dithiane
Mercaptoacetaldehyde dimer
p-Dithiane-2,5-diol

CAS

40018-26-6

Formula

C4H8O2S2

Molecular Weight

152.24

EINECS

254-751-6

Beilstein/Gmelin

104402

Beilstein Reference

4-01-00-03966

EC Class

harmful

Physical and Chemical Properties

Appearance

White to light yellow crystalline powder. With a stench.

Solubility in water

Soluble

Melting Point

110

Boiling Point

285

pKa/pKb

12.04 (pKa)

Partition Coefficient

.99

First Aid Measures

Ingestion

Induce vomiting. Get medical aid. Wash mouth out with water.

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

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

Store in a tightly closed container. Store in a dry area. Refrigerator (approx 4 C).

Handling

Use with adequate ventilation. Avoid contact with skin and eyes. Do not breathe dust, vapor, mist, or gas. Take precautionary measures against static discharges.

Hazards Identification

Ingestion

Harmful if swallowed. May cause irritation of the digestive tract.

Inhalation

May cause respiratory tract irritation. May be harmful if inhaled.

Skin

May cause skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. May be harmful if absorbed through the skin.

Eyes

May cause eye irritation and possible damage.

EC Risk Phrase

R 22 41 43

EC Safety Phrase

S 26 36/37/39

UN (DOT)

3335

Exposure Controls/Personal Protection

Personal Protection

Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.

Respirators

Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.

Fire Fighting Measures

Autoignition

310

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container. Reduce airborne dust and prevent scattering by moistening with water. Avoid generating dusty conditions. Remove all sources of ignition.

Stability and Reactivity

Stability

No data.

Incompatibilities

Strong oxidizing agents, acids, bases.

Decomposition

Carbon monoxide, oxides of sulfur, carbon dioxide.

Transport Information

UN Number

3335

HS Code

2934 99 90