- Sulfurous oxychloride
- Sulfinyl chloride
- Sulfur chloride oxide
- Sulfurous dichloride
- Thionyl dichloride
Colorless to yellow to reddish liquid with a pungent odor of sulfur dioxide.
For making acyl chlorides, to replace hydroxide of sulfhydryl groups with chlorine atoms.
Registry Numbers and Inventories.
EC Index Number
Reacts violently with water; Harmful; Contact with water liberates toxic gas; Corrosive
R 14 20/22 29 35
S 26 36/37/39 45
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
97 (20 C)
Vapor density (air=1)
130,000 ppm (13%) at 21 C (calculated)
1.64 g/cm3 (20 C)
Solubility in water
1.517 (20 C)
Partition coefficient, pKow
Heat of vaporization
Hazards and Protection.
Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from water. Corrosives area. Keep away from acids. Do not store in metal containers.
Keep container tightly closed. Do not get on skin or in eyes. Do not ingest or inhale. Use with adequate ventilation. Do not allow contact with water. Discard contaminated shoes.
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 nitrile-latex gloves, apron, and/or clothing. Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear nitrile-latex gloves, apron, and/or clothing. Wear appropriate protective clothing to minimize contact with skin.
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.
Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Use water spray to disperse the gas/vapor. Use a spark-proof tool. Do not get water inside containers. Cover with dry earth, dry sand, or other non-combustible material followed with plastic sheet to minimize spreading and contact with water.
Stable under normal temperatures and pressures.
Water, metals, ammonia, dimethyl sulfoxide, dimethyl formamide, lithium, sodium, alkalies.
Hydrogen chloride, chlorine, oxides of sulfur, irritating and toxic fumes and gases.
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water Reactive. Material will react with water and may release a flammable and/or toxic gas. Containers may explode in the heat of a fire. Contact with metals may evolve flammable hydrogen gas. Extinguishing media: Do NOT use water directly on fire. If water is the only media available, use in flooding amounts. Do NOT get water inside containers. Cool containers with flooding quantities of water until well after fire is out. For small fires, use dry chemical or carbon dioxide.
May burn but does not ignite readily.
May ignite combustibles (wood, paper, oil, clothing, etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases. Flammable/toxic gases may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.)Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. Substance may be transported in a molten form.
Fire will produce irritating, corrosive and/or toxic gases. Reaction with water may generate much heat which will increase the concentration of fumes in the air.
NIOSH REL: C 1 ppm (5 mg/m3)
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns.
Harmful if inhaled. Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.
Causes skin burns. Causes redness and pain.
Causes eye burns. Causes redness and pain. Lachrymator.
Do NOT induce vomiting. 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.
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).
USCG CHRIS Code
2812 10 95
Std. Transport #