NTP CHEMICAL REPOSITORY (RADIAN CORPORATION, AUGUST 29, 1991)
IDENTIFIERS
CATALOG ID NUMBER: 002022
CAS NUMBER: 79-29-8
BASE CHEMICAL NAME: DIMETHYLBUTANE,2,3-
PRIMARY NAME: 2,3-DIMETHYLBUTANE
CHEMICAL FORMULA: C6H14
STRUCTURAL FORMULA: (CH3)2CHCH(CH3)2
WLN: 1Y1&Y1&1 able
SYNONYMS:
BIISOPROPYL
DIISOPROPYL
1,1,2,2-TETRAMETHYLETHANE
UN2457
BUTANE, 2,3-DIMETHYL-
PHYSICAL CHEMICAL DATA
PHYSICAL DESCRIPTION: LITERATURE: Colorless liquid
REPOSITORY: Clear, colorless liquid
MOLECULAR WEIGHT: 86.18
SPECIFIC GRAVITY: 0.6616 @ 20/4 C [016,047,430]
DENSITY: 0.66164 g/mL @ 20 C [062]
MP (DEG C): -128.5 C [016,047,205]
BP (DEG C): 58.0 C [016,025,047,269]
SOLUBILITIES:
WATER : <1 mg/mL @ 23.5 C (RAD)
DMSO : 10-50 mg/mL @ 23.5 C (RAD)
95% ETHANOL : >=100 mg/mL @ 23.5 C (RAD)
METHANOL : Not available
ACETONE : >=100 mg/mL @ 23.5 C (RAD)
TOLUENE : Not available
OTHER SOLVENTS:
Ether: >10% [047]
Benzene: >10% [047]
Alcohol: Very soluble [205]
Hot water: Very soluble [205]
VOLATILITY:
Vapor pressure: 200 mm Hg @ 21.1 C [038]; 400 mm Hg @ 39 C [038,043,430]
Vapor density : 3.00 [043,055,430,451]
FLAMMABILITY(FLASH POINT):
The flash point for this chemical is -28.9 C (-20 F) [043,062]. It is
flammable. Fires involving this material can be controlled with a dry
chemical, carbon dioxide or Halon extinguisher. The autoignition temperature
of this compound is 420 C (788 F) [043,062].
UEL: 7.0% [043,058,430,451] LEL: 1.2% [043,058,430,451]
REACTIVITY:
This compound is incompatible with oxidizing materials [043,058,269].
It is also incompatible with oxygen [058].
STABILITY:
This chemical is stable under normal laboratory conditions. Solutions of
this chemical in water, DMSO, 95% ethanol or acetone should be stable for 24
hours under normal lab conditions (RAD).
OTHER PHYSICAL DATA:
Refractive index: 1.3750 @ 20 C [016,025,269,430]
Vapor pressure: 1 mm Hg @ -63.6 C, 5 mm Hg @ -44.5 C, 10 mm Hg @ -34.9 C,
20 mm Hg @ -24.1 C, 40 mm Hg @ -12.4 C, 60 mm Hg @ -4.9 C, 100 mm Hg @ 5.4 C
[038]
Specific gravity: 0.67 @ 17/4 C [055]; 0.666 @ 15.6/15.6 C [058]
Freezing point: -128.41 C [062]
Viscosity: <32 SUS [430]
100% volatile by volume [058]
Evaporation rate (ethyl ether = 1): <1 [058]
Mild gasoline-like odor [421]
TOXICITY
NIOSH REGISTRY NUMBER: EJ9350000
TOXICITY:
typ. dose mode specie amount units other
Not available
AQTX/TLM96: Not available
SAX TOXICITY EVALUATION:
THR: Probably an irritant and narcotic in high concentrations.
CARCINOGENICITY: Not available
MUTATION DATA: Not available
TERATOGENICITY: Not available
STANDARDS, REGULATIONS & RECOMMENDATIONS:
OSHA: Federal Register (1/19/89)
Final Limit: PEL-TWA 500 ppm; STEL 1000 ppm [610]
ACGIH: TLV-TWA 500 ppm; STEL 1000 ppm [610]
NIOSH Criteria Document: Recommended Exposure Limit to this type of compound-
air: TWA 100 ppm; Ceiling Limit: 510 ppm/15M [610]
NFPA Hazard Rating: Health (H): 1
Flammability (F): 3
Reactivity (R): 0
H1: Materials only slightly hazardous to health (see NFPA for details).
F3: Materials which can be ignited under almost all normal temperature
conditions (see NFPA for details).
R0: Materials which are normally stable even under fire exposure conditions
and which are not reactive with water (see NFPA for details).
OTHER TOXICITY DATA:
Standards and Regulations: DOT-Hazard: Flammable liquid; Label: Flammable
Liquid
Status: EPA TSCA Chemical Inventory, 1986
EPA TSCA Test Submission (TSCATS) Data Base, September 1989
OTHER DATA (Regulatory)
PROPER SHIPPING NAME (IATA): 2,3-Dimethylbutane
UN/ID NUMBER: UN2457
HAZARD CLASS: 3 SUBSIDIARY RISK: None PACKING GROUP: II
LABELS REQUIRED: Flammable liquid
PACKAGING: PASSENGER: PKG. INSTR.: 305, Y305 MAXIMUM QUANTITY: 5 L, 1 L
CARGO : PKG. INSTR.: 307 MAXIMUM QUANTITY: 60 L
SPECIAL PROVISIONS: None
USES:
This compound is a component of high octane fuel. It is also used in
organic synthesis. This type of compound is used as a solvent for vegetable
oils, glues, coatings and paints, in gasoline, as an intermediate for
chemicals and in rubber solvents and petroleum ether [421].
COMMENTS: Not available
HANDLING PROCEDURES
ACUTE/CHRONIC HAZARDS:
This compound may cause irritation of the skin and upper respiratory tract
[058]. It may be harmful by inhalation, absorption or ingestion [269]. When
heated to decomposition this compound emits acrid smoke and irritating fumes of
carbon oxides and various hydrocarbons [043,058,269]. Flashback may occur
along the vapor trail [058].
MINIMUM PROTECTIVE CLOTHING: Not available
RECOMMENDED GLOVE MATERIALS:
GlovES+ Expert System Glove Types For The Neat (Undiluted) Chemical:
This chemical has not been tested for permeation by Radian Corporation;
however, the GlovES+ expert system was used to extrapolate permeation test
information from compounds in the same chemical class. The GlovES+ system uses
permeation data from literature sources; therefore, extra safety margins should
be used with the estimated protection time(s). If this chemical makes direct
contact with your glove, or if a tear, puncture or hole develops, replace them
at once.
The GlovES+ expert system is a tool that can help people better manage
protection from chemicals, however this tool cannot replace sound judgment nor
make technical decisions. Our GlovES+ expert system is designed to offer
initial advice and assistance in glove selection while the final glove
selection should be made by knowledgeable individuals based on the specific
circumstances involved.
Glove Type Model Number Thickness Estimated Protection Time
Nitrile North LA-142G 0.38 mm 240 min
Neoprene Edmont NEOX 0.38 mm 240 min
PE/EVAL/PE Safety 4 4H 0.07 mm 240 min
PVA Edmont 25-545 0.60 mm 360 min
RECOMMENDED RESPIRATOR:
When working with this chemical, wear a NIOSH-approved full face
chemical cartride respirator equipped with the appropriate organic vapor
cartridges. If that is not available, a half face respirator similarly
equipped plus airtight goggles can be substituted. However, please note
that half face respirators provide a substantially lower level of protection
than do full face respirators.
OTHER: Not available
STORAGE PRECAUTIONS:
You should store this chemical in an explosion-proof refrigerator and keep
it away from all oxidizing materials. STORE AWAY FROM SOURCES OF IGNITION.
SPILLS AND LEAKAGE:
If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION. Then,
use absorbent paper to pick up all liquid spill material. Your contaminated
clothing and absorbent paper should be sealed in a vapor-tight plastic bag for
eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol
followed by washing with a soap and water solution. Do not reenter the
contaminated area until the Safety Officer (or other responsible person) has
verified that the area has been properly cleaned.
DISPOSAL AND WASTE TREATMENT: Not available
EMERGENCY PROCEDURES
SKIN CONTACT:
IMMEDIATELY flood affected skin with water while removing and isolating
all contaminated clothing. Gently wash all affected skin areas thoroughly
with soap and water.
If symptoms such as redness or irritation develop, IMMEDIATELY call a
physician and be prepared to transport the victim to a hospital for treatment.
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; if not available, use a level of protection greater than or
equal to that advised under Respirator Recommendation.
EYE CONTACT:
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.
IMMEDIATELY transport the victim after flushing eyes to a hospital even if
no symptoms (such as redness or irritation) develop.
INGESTION:
DO NOT INDUCE VOMITING. Volatile chemicals have a high risk of being
aspirated into the victim's lungs during vomiting which increases the medical
problems.
If the victim is conscious and not convulsing, give 1 or 2 glasses of
water to dilute the chemical and IMMEDIATELY call a hospital or poison control
center. IMMEDIATELY transport the victim to a hospital.
If the victim is convulsing or unconscious, do not give anything by mouth,
ensure that the victim's airway is open and lay the victim on his/her side with
the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport
the victim to a hospital.
SYMPTOMS:
Symptoms of exposure to this compound may include redness and swelling of
mucous membranes, irritation of the skin and upper respiratory tract,
defatting of the skin, headache, fatigue, hypersensitivity, tremors, central
nervous system effects, diarrhea, central nervous system depression, pulmonary
edema and chemical pneumonitis [058].
Symptoms of exposure to related compounds may include dizziness,
giddiness, nausea, eye irritation and irritation of the throat [421].
SOURCES
========
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