Butane, liquid

  • n-Butane
  • Methylethyl methane
Formula
CH3CH2CH2CH3
Structure
Description
Contains isobutane and n-butane, which are chemically similar. An colorless gas with a faint disagreeable odor.
Uses
As producer gas, in manufacture of synthetic rubbers.

Registry Numbers and Inventories.
CAS
106-97-8
EC (EINECS/ELINCS)
203-448-7
EC Index Number
601-004-01-8
EC Class
Extremely flammable; Carcinogenic Category 1; Mutagenic Category 2
S 9 16 33
RTECS
EJ4200000
RTECS class
Other
UN (DOT)
1011
Merck
13,1505
Beilstein/Gmelin
969129
Beilstein Reference
4-01-00-00238
Swiss Giftliste 1
G-1312
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H10
Formula mass
58.12
Melting point, °C
-138.4
Boiling point, °C
-0.45
Vapor pressure, mmHg
1556 (20 C)
Vapor density (air=1)
2.046
Odor Threshold Odor threshold 50,000 ppm
Critical temperature
153.2
Critical pressure
37.5
Density
0.579 g/cm3 (20 C0
Solubility in water
61 mg/L (20 C)
Viscosity
0.0074 cp (20 C)
Surface tension
14.87 g/s2 (20 C)
Refractive index
1.3326 (20 C)
Dielectric constant
1.0 (25 C)
Partition coefficient, pKow
2.89
Thermal expansion
0.002/K at 20 C
Heat of fusion
4.5 kJ/mol
Heat of vaporization
24.7 kJ/mol
Heat of combustion
-2879 kJ/mol

Hazards and Protection.
Storage
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.
A B1
Handling
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.
Protection
Wear appropriate protective gloves, clothing and goggles. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Respirators
Self-contained breathing apparatus and safety goggles.
Small spills/leaks
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. If possible, turn leaking containers so that gas escapes rather than liquid. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. Do not direct water at spill or source of leak. Prevent spreading of vapors through sewers, ventilation systems and confined areas. Isolate area until gas has dispersed. CAUTION: When in contact with refrigerated/cryogenic liquids, many materials become brittle and are likely to break without warning.
Stability
Extremely
Incompatibilities
Incompatible with strong oxidizing agents such as nitric acid.

Fire.
Flash Point,°C
-60
Autoignition, °C
405
Upper exp. limit, %
8.5
Lower exp. limit, %
1.8
Fire fighting
DO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED. SMALL FIRES: Dry chemical or carbon dioxide. LARGE FIRES: Water spray or fog. Move containers from fire area if you can do it without risk. FIRE INVOLVING TANKS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Do not direct water at source of leak or safety devices; icing may occur. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.
Fire potential
EXTREMELY FLAMMABLE.
Hazards
Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Containers may explode when heated. Ruptured cylinders may rocket.
Combustion products
When heated, emits acrid fumes.
Health
1
 
Flammability
4
 
 
Reactivity
0
 

Health.
Exposure limit(s)
600 ppm
Poison_Class
-
Exposure effects
Rapid breathing and rapid heart rate are common. In severe cases abnormally low blood pressure, apnea, and cardiac arrest develop. Various disturbances including headache, dizziness, mood disturbances, numbness of the extremities, sleepiness, mental confusion, poor judgement and coordination, and memory loss may occur. Prolonged or severe hypoxia results in unconsciousness. Prolonged asphyxia may produce CNS injury. Hemiparesis has been reported with volatile substance abuse. Cerebral edema with brainstem herniation may occur. Seizures have been reported following intentional inhalation.
   Ingestion
Nausea, vomiting, and gastrointestinal hemorrhage may develop.
   Inhalation
Hyperventilation may develop.
   Skin
Dermal exposure may cause frostbite injury. Severe tissue burns have been reported.
   Eyes
Decreases in night vision, visual acuity, and visual fields (tunnel vision) may occur. Frothy mucous may be seen.

First aid
 
   Ingestion
This compound is a gas, therefore inhalation is the first route of exposure.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
CAUTION: Exposure of skin to compressed gases may result in freezing of the skin. Treatment for frostbite may be necessary. Remove the victim from the source of contamination. IMMEDIATELY wash affected areas gently with COLD water (and soap, if necessary) while removing and isolating all contaminated clothing. Dry carefully with clean, soft towels. If symptoms such as inflammation or irritation develop, IMMEDIATELY call a physician or go to a hospital for treatment.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. If symptoms (such as redness or irritation) develop, immediately transport the victim to a hospital.

Transport.
UN number
1011
Response guide
Hazard class
2.1
USCG CHRIS Code
BUT
 
Std. Transport #
4905706 4905422 4905702
 
IMO Gas Code
B