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butane-2,3-dione
CAS No.: 431-03-8
Synonyms:
Formula: C4H6O2
Exact Mass: 86.03680
Molecular Weight: 86.08920
PSA: 34.14000
LogP: 0.16440
Reference Price: $10,242/ton Inquiry Now
butane-2,3-dione 431-03-8 MSDS
Name: 2 3-Butanedione 99% Material Safety Data Sheet
Synonym: Diacetyl; 2,3-Diketobutane; Dimethyl diketone; Dimethylglyoxal; Biacetyl
CAS: 431-03-8
Section 1 - Chemical Product   MSDS Name:2 3-Butanedione 99% Material Safety Data Sheet
Synonym:Diacetyl; 2,3-Diketobutane; Dimethyl diketone; Dimethylglyoxal; Biacetyl

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
431-03-8 2,3-Butanedione 99 207-069-8
Hazard Symbols: XN F
Risk Phrases: 11 20/22 36/37/38

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Highly flammable. Harmful by inhalation and if swallowed. Irritating to eyes, respiratory system and skin.
Potential Health Effects
Eye:
Causes eye irritation. Causes redness and pain. May cause chemical conjunctivitis and corneal damage.
Skin:
Causes moderate skin irritation. Causes redness and pain. May be harmful if absorbed through the skin.
Ingestion:
Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Ingestion of large amounts may cause CNS depression.
Inhalation:
Causes respiratory tract irritation. May cause lung damage. Vapors may cause dizziness or suffocation. Harmful if inhaled. Inhalation of vapors may cause drowsiness and dizziness.
Chronic:
Chronic exposure may cause lung damage.

Section 4 - FIRST AID MEASURES
  Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
If victim is conscious and alert, give 2-4 cupfuls of milk or water.
Never give anything by mouth to an unconscious person. Get medical aid.
Inhalation:
Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:

Section 5 - FIRE FIGHTING MEASURES
  General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors may form an explosive mixture with air.
During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Containers may explode in the heat of a fire. Flammable liquid and vapor. Vapors are heavier than air and may travel to a source of ignition and flash back. Vapors can spread along the ground and collect in low or confined areas.
Hazardous polymerization may occur under fire conditions.
Extinguishing Media:
Water may be ineffective. Water may spread fire. If water is the only media available, use in flooding amounts. Do NOT use straight streams of water. Use water fog, dry chemical, carbon dioxide or alcohol type foam.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, observing precautions in the Protective Equipment section. Remove all sources of ignition. Use a spark-proof tool. A vapor suppressing foam may be used to reduce vapors.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Do not breathe dust, vapor, mist, or gas. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Keep away from heat, sparks and flame. Use only with adequate ventilation or respiratory protection.
Storage:
Keep away from sources of ignition. Store in a tightly closed container. Refrigerator/flammables.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels.
Exposure Limits CAS# 431-03-8: Personal Protective Equipment Eyes: Wear chemical splash goggles.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Liquid
Color: yellow to green
Odor: strong rancid - chlorine-like - butter-like
pH: Not available.
Vapor Pressure: 39 mm Hg @ 20 deg C
Viscosity: Not available.
Boiling Point: 88 deg C @ 760 mm Hg
Freezing/Melting Point: -4 deg C
Autoignition Temperature: 365 deg C ( 689.00 deg F)
Flash Point: 6 deg C ( 42.80 deg F)
Explosion Limits, lower: 2.4%
Explosion Limits, upper: 13.0%
Decomposition Temperature: > 110 deg C
Solubility in water: Soluble.
Specific Gravity/Density: .9850
Molecular Formula: C4H6O2
Molecular Weight: 86.09

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures. Material is heat sensitive and may decompose at elevated temperatures.
Conditions to Avoid:
Light, ignition sources, excess heat.
Incompatibilities with Other Materials:
Metals, oxidizing agents, reducing agents, acids, strong bases.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide.
Hazardous Polymerization: Has not been reported

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 431-03-8: EK2625000 LD50/LC50:
CAS# 431-03-8: Draize test, rabbit, skin: 500 mg/24H Moderate; Oral, rat: LD50 = 1580 mg/kg; Oral, rat: LD50 = 3000 mg/kg; Skin, rabbit: LD50 = >5 gm/kg.
Carcinogenicity:
2,3-Butanedione - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
  Other No information available.

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: BUTANEDIONE
Hazard Class: 3
UN Number: 2346
Packing Group: II
IMO
Shipping Name: BUTANEDIONE
Hazard Class: 3.2
UN Number: 2346
Packing Group: II
RID/ADR
Shipping Name: BUTANEDIONE
Hazard Class: 3
UN Number: 2346
Packing group: II

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XN F
Risk Phrases:
R 11 Highly flammable.
R 20/22 Harmful by inhalation and if swallowed.
R 36/37/38 Irritating to eyes, respiratory system
and skin.
Safety Phrases:
S 16 Keep away from sources of ignition - No
smoking.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 33 Take precautionary measures against static
discharges.
S 36/37/39 Wear suitable protective clothing, gloves
and eye/face protection.
WGK (Water Danger/Protection)
CAS# 431-03-8: 1
Canada
CAS# 431-03-8 is listed on Canada's DSL List.
CAS# 431-03-8 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 431-03-8 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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