Sulphur Dioxide N3.0

Hazard statements (CLP)

H280, H314, H331

Code

Statements

H280

Contains gas under pressure; may explode if heated

2.1 Classification of the substance or mixture

Classification under South African Hazardous Chemical Substances Regulations subsequently amended. (HCS) - Classification under the Globally Harmonized System of classification and labelling of chemicals (GHS) Emergency Colour: None Overview Odour: Pungent, Sulphurous Taste: Acidic Physical State: Compressed Gas Form:Gas under pressure Main Hazards - All cylinders are portable gas containers and must be regarded as pressure vessels at all times. Sulphur dioxide is a highly irritating gas; it readily elicits respiratory reflexes. It is intensely irritating to the eyes, throat, and respiratory tract. Adverse Health - Inhalation of this gas in concentrations of Effects 8-12ppm in air causes throat irritation, coughing, constriction of the chest, lacrimation, and smarting of the eyes. - A concentration of 150 ppm can be endured only a few minutes, because of eye irritation and the effect on the membranes of the nose, throat and lungs. - Exposure to a concentration of 500 ppm by volume in air for a few minutes is very dangerous. Chemical - Sulphur dioxide dissolves in water forming sulphurous acid, which is unstable toward heat. In many of its reactions, sulphur dioxide behaves as a reducing agent. Biological - Liquid Sulphur dioxide may cause skin and eye burns upon contact with these tissues, which results from the freezing effect of the liquid on the skin or eyes. Low (1%) concentrations of the vapour are irritating to moist skin within a period of 3 minutes Vapour - Acute exposure through inhalation may Inhalation result in dryness and irritation of the nose and throat, choking, sneezing, coughing, and bronchospasm. Severe overexposure may cause death through systemic acidosis, from pulmonary oedema, or from respiratory arrest. Eye Contact - Corneal burns, opacification of the cornea, and blindness may result if liquid Sulphur dioxide is splashed in the eyes. Sulphur dioxide can penetrate the intact cornea and cause iritis. Skin Contact - Liquid sulphur dioxide can cause frostbite and skin burns, and it converts to sulphurous acid in moist environments, which may cause skin irritation. Ingestion - Severe burns to the mouth, throat, and gastrointestinal system may occur. GHS - Acute Toxicity, Inhalation (Category 3)

Classifications

Skin Corrosion/Irritation (Category 1) - Eye Damage/Irritation (Category 1) - Gas under pressure (Liquefied gas) GHS

Signal word

Danger

Hazard statements

H280: Contains gas under pressure, may explode if heated - H331: Toxic if inhaled - H314: Causes severe skin burns and eye damage GHS

Precautionary statements

P410+P403 : Protect from sunlight and store in a well-ventilated place. - P403 + P233 : Store in a well-ventilated place. Keep container tightly closed. - P405 : Store locked up.

Prevention

P261 : Avoid breathing fume, gas, mist, or vapours. - P271 : Use only outdoors or in a well- ventilated area. - P264 : Wash skin thoroughly after handling. - P280 : Wear protective gloves, protective clothing, eye protection and face protection.

Response

P301 + P330 – If Swallowed: Rinse mouth. Do not induce vomiting. P304 + P340 IF INHALED Remove person to fresh air and keep comfortable for breathing. P305 + P351 + P338 If in Eyes Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. - P310 : Immediately call a POISON CENTRE/doctor - P321 : Specific treatment (see FIRST AID MEASURES on this sheet) P303 + P361 + P353 If on Skin (or hair) Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower - P363 : Wash contaminated clothing before reuse.

Disposal

Dispose of contents in accordance with local, regional, national and international regulations.

2.3 Other hazards

Corrosive to the respiratory tract that do not - Contact with evaporating liquid may result in cause frostbite or freezing of skin.