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2,3-Butanedione

Catalog_Number:

DB-003225

CAS:

431-03-8

Formula:

CH3COCOCH3

Formula_Weight:

86.09g/mol

Purity:

95%
NOTICE: THE PRODUCT IS JUST ONLY FOR LAB RESEARCH, NOT FOR OTHER USE.
IUPAC_Name: butane-2,3-dione
InChI InChI=1S/C4H6O2/c1-3(5)4(2)6/h1-2H3
InChiKey QSJXEFYPDANLFS-UHFFFAOYSA-N
Synonyms:

2,3-Butanedione

Biacetyl

Biacétyl

Canonical SMILES: CC(=O)C(=O)C
Physical Description:

DIACETYL is a clear colorless liquid with a strong chlorine-like odor. Flash point 80°F. Less dense than water. Vapors heavier than air.

Greenish-yellow liquid:Lewis, R.J. Sr. (ed) Sax's Dangerous Properties of Industrial Materials. 12th Edition. Wiley-Interscience, Wiley & Sons, Inc. Hoboken, NJ. 2012., p. V2: 725

Odor: Quinone odor; vapors have a
Density: 0.99 at 59° F (NTP, 1992)
Boiling Point: 190° F at 760 mm Hg (NTP, 1992)
Melting Point: 27.7° F (NTP, 1992)
Flash Point: 80° F (NTP, 1992)
Solubility: greater than or equal to 100 mg/mL at 72° F (NTP, 1992)
Stability: Stable under recommended storage conditions.
Density: 0.99 at 59° F (NTP, 1992)
Vapour Pressure: 62.3±0.1 mmHg at 25°C
Enthalpy of Vaporization: 32.8±3.0 kJ/mol
Index of Refraction: 1.381
Molar Refractivity: 20.6±0.3 cm3
Experimental Boiling Point: 87-88 °C
Experimental Gravity: 20 g/mL
Experimental Flash Point: 10 °C
Appearance: liquid with a butter-like odour
Vapor Density: 3 (NTP, 1992) (Relative to Air)
Vapor Pressure: 56.8 mm Hg at 25 deg C
Storage Conditions: Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Recommended storage temperature 2 - 8 deg C. Storage class (TRGS 510): Flammable liquids.
Decomposition: When heated to decomposition it emits acrid smoke and fumes.
Taste: Taste characteristics at 50 ppm: sweet, buttery, creamy and milky
Analytic Laboratory Methods: Method: OSHA 1012; Procedure: gas chromatography using an electron capture detector; Analyte: diacetyl; Matrix: air; Detection Limit: 1.30 ppb (4.57 ug/cu m).
Reactive Group: Ketones
Safety: 11-20/22-36/38
Health Hazard: Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]: Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control may cause pollution. (ERG, 2016)
Fire Hazard: Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]: HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water. (ERG, 2016)
GHS Classification:
Signal: Danger
GHS Hazard Statements
Aggregated GHS information from 1 notifications provided by 23 companies to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

H225 (100%): Highly Flammable liquid and vapor [Danger Flammable liquids]
H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]
H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]
H318 (100%): Causes serious eye damage [Danger Serious eye damage/eye irritation]
H332 (100%): Harmful if inhaled [Warning Acute toxicity, inhalation]
H335 (100%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from all companies. (Only Hazard Codes with percentage values above 10% are shown when majority companies gave hazard codes.)

Precautionary Statement Codes
P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P280, P301+P312, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P330, P332+P313, P362, P370+P378, P403+P233, P403+P235, P405, and P501
Air and Water Reactions: Highly flammable. Soluble in water.
Skin Eye and Respiratory Irritations: A skin irritant.
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