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Butane Safety Data Sheet 1. Product and Company Identification Product name Butane Product code cse-218 Enquiries: F. Hoffmann-La Roche AG Postfach CH-4070 Basel Switzerland Phone +41-61/688 54 80 Fax +41-61/681 72 76 Local representation: Company information 2. Composition/Information on ingredients Chemical name - n-Butane Synonyms - Methylethylmethane CAS number 106-97-8 EINECS number 203 448 7 UN number 1011 Empirical formula C4H10 Molecular mass 58.12 g/mol 3. Hazards identification Most important hazards - Extremely flammable. 4. First-aid measures Eye contact - rinse immediately with tap water for 10 minutes - open eyelids forcibly Skin contact - remove immediately contaminated clothes, wash affected skin with plenty of water Inhalation - remove the casualty to fresh air and keep him/her calm - summon a physician immediately Note to physician - treat symptomatically Page: 1/5 Replacing edition of: -- Date: 8.6.06/CSE (SEISMO) Butane 5. Fire-fighting measures Suitable extinguishing media - water spray jet, dry powder, foam, carbon dioxide, extinguish only in case the feed or leak can be subsequently be stopped Specific hazards - elevated explosion hazard: observe a wide safety perimeter - caution, risk of backward ignition! - heating containers will cause pressure to rise (risk of bursting or explosion) Protection of fire-fighters - precipitate gases/vapours/mists with water spray - use self-contained breathing apparatus Special method of fire-fighting - interrupt gas supply - cool endangered containers with water spray - fight fire from a safe position - use a mobile water jet 6. Accidental release measures Personal precautions - evacuate area, remove sources of ignition, ventilate Environmental protection - do not allow to enter drains or waterways (explosion hazard) 7. Handling and storage Handling Technical measures - processing in closed systems, if possible superposed by inert gas (e.g. nitrogen) - take precautionary measures against electrostatic charging - local exhaust ventilation necessary Storage Storage conditions - below 50°C - protect pressurised gas container against direct solar irradiation or strong heat sources - secure container and keep tightly closed - in closed rooms forced ventilation is required 8. Exposure controls/Personal protection Engineering Measures - see 7. Monitoring Threshold value (D) air - STEL: 4000 ppm (4 x 15 min) (both isomers) - STEL: 9600 mg/m3 (4 x 15 min) (both isomers) - MAK: 1000 ppm (both isomers) - MAK: 2400 mg/m3 (both isomers) Threshold value (USA) air - ACGIH-TLV: 1000 ppm Page: 2/5 Replacing edition of: -- Date: 8.6.06/CSE (SEISMO) Butane Personal protective equipment Respiratory protection - respirator with independent air supply or protective mask with AX-filter Hand protection - frost resistant protective gloves Eye protection - tightly fitting safety glasses Body protection - connect persons to earth by means of conductive shoes and conductive floor - boots - apron 9. Physical and chemical properties Colour colourless Form gaseous Odour sweetish Refraction index n D 20 1.3326 Solubility 88 mg/l, water (20 °C) > 10 %, ethanol > 10 %, diethyl ether Partition coefficient log Pow 2.89 (octanol/water) Melting temperature -138 °C Boiling temperature -0.5 °C Vapour pressure 2.0 bar (20 °C) Vapour density 2.1 (Air = 1) Flash point (liquid) -60 °C (DIN 51’755) flammable gas Explosion limits lower: 1.5 vol %; upper: 8.5 vol % 10. Stability and reactivity Conditions to avoid - pressure tank: temperatures above 50 °C - sparks Materials to avoid - oxidizing agents (violent reaction) Page: 3/5 Replacing edition of: -- Date: 8.6.06/CSE (SEISMO) Butane 11. Toxicological information Acute toxicity LC50 658’000 mg/m3 (inhal., rat, 4 h) - Local effects - eye: non-irritant (rabbit) Mutagenicity not mutagenic (Ames test; OECD No. 479 (Sister Chromatid Exchange Assay)) - Note - the following symptoms may occur: drowsiness, dizziness, loss of consciousness - risk of frostbite 12. Ecological information Inherent biodegradability - inherently biodegradable 65.7 %, 35 d Ecotoxicity barely toxic for fish (fish, unspecified) Tlm (96 h) > 1000 mg/l - Air pollution - observe local/national regulations 13. Disposal considerations Waste from residues - observe local/national regulations regarding waste disposal 14. Transport information UN/ID PG 2.1 1011 2.1 */200 - * forbidden/air transport only IATA Remark: IATA Class Label PI UN EmS 2.1 2.1 IMDG 1011 Class Label Mark PG PI P200/ - F-D S-U 2.1 2.1 RID/ADR Class 23 Haz.no Label UN 1011 PG PI P200/ - Classif.code 2F Proper shipping name BUTANE Page: 4/5 Replacing edition of: -- Date: 8.6.06/CSE (SEISMO) Butane 15. Regulatory information Classification and labelling according to EU directives R12 Extremely flammable. S9 Keep container in a well-ventilated place. S16 Keep away from sources of ignition --- No smoking. F Water hazard class (Germany) not hazardous for water (approved classification according to directive VwVwS of 17.05.1999) 16. Other information Use - chemical raw material NFPA Rating - Health: 1 Fire: 4 Reactivity: 0 Edition documentation - first edition The information in this safety data sheet is based on current scientific knowledge. It should not be taken as expressing or implying any warranty concerning product characteristics. Page: 5/5 Replacing edition of: -- Date: 8.6.06/CSE (SEISMO)
