- Sulfur mustard gas
- Yellow cross liquid
Mustard gas is a clear amber colored oily liquid with a faint odor of mustard.
Vesicant in chemical warfare, model compound in biological studies on alkylating agents.
Registry Numbers and Inventories.
Tumorigen; Mutagen; Reproductive Effector; Human Data; Primary Irritant
Swiss Giftliste 1
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
0.072 (25 C)
Vapor density (air=1)
Odor Threshold Odor threshold 1.30X10-3 mg/L
1.285 g/cm3 (15 C)
Solubility in water
105.53 cp (15 C)
42.5 g/s2 (25 C)
1.5278 (15 C)
Heat of fusion
Heat of vaporization
Hazards and Protection.
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear rubber gloves, overalls. Wear positive pressure self contained breathing apparatus. Wear appropriate chemical protective clothing.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.
Hydrolyzed in aqueous solution (half-life: 5 min at 37 C).
Incompatible with bleaching powder Reacts violently with oxidizing materials Reacts with water or steam to produce toxic and corrosive fumes.
Dangerous when heated to decomposition. Emits highly toxic fumes of sulfur oxides and hydrogen chloride.
Protective clothing and self-contained breathing apparatus required in presence of mustard gas.Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.Extinguish with water, foam, dry chemical, or carbon dioxide.
Can be ignited by large explosive charge. When heated to decomposition, emits highly toxic fumes of oxides of sulfur and chlorine containing compounds. Reacts with water or steam to produce toxic and corrosive fumes. Containers may rupture violently in a fire. Incompatible with bleaching powder. Reacts violently with oxidizing materials. Reacts with water or steam to produce toxic and corrosive fumes. Unstable, hydrolyzed in aqueous solution. Avoid high heat; contact with acid or acid fumes.
Fire may produce irritating, corrosive and/or toxic gases.
I-1, N-1, CP65
Dyspnea and paroxysmal cough are common. Fever may occur. Dizziness, malaise, anorexia, lethargy can occur after acute exposure. Intellectual dullness is common. Probable human teratogen.
Nausea, vomiting, diarrhea and epigastric pain can be caused either by ingestion or systemic absorption.
Irritation or ulceration of the respiratory tract can occur from inhalation; lesions may be fatal. Respiratory impairment may be delayed and severe. Pulmonary edema may occur.
Severe irritation was produced from doses as low as 65 mcg in humans. The first effect on skin is redness, similar to a sunburn.
Seek medical assistance.
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.
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.
Irrigate thoroughly with water and neutralize with a 2.5 Per cent solution of sodium thiosulfate. Treat systematic effects as outlined in the inhalation exposure section.
I; II; III
USCG CHRIS Code
Std. Transport #