2,3-Butanedione

Melting point :-4--2 °C
Boiling point :88 °C(lit.)
Density :0.985 g/mL at 20 °C
vapor density :3 (vs air)
vapor pressure :52.2 mm Hg ( 20 °C)
FEMA :2370 | DIACETYL
refractive index :n20/D 1.394(lit.)
Flash point :45 °F
storage temp. :Store at +2°C to +8°C.
solubility :200g/l
form :Liquid
color :Clear yellow
Odor :at 1.00 % in propylene glycol. strong butter sweet creamy pungent caramel
Odor Type :buttery
explosive limit :2.4-13.0%(V)
Odor Threshold :0.00005ppm
Water Solubility :200 g/L (20 ºC)
Merck :14,2966
JECFA Number :408
BRN :605398
Henry's Law Constant :7.3×10^-1 mol/(m³Pa) at 25℃, Burkholder et al. (2019)
Exposure limits :EU LTEL:0.02 ppm(0.07 mg/m3); EU STEL:0.1 ppm(0.36 mg/m3)
Stability :Stable. Flammable. Incompatible with acids, strong bases, metals, reducing agents, oxidizing agents. Protect from moisture and water. Note low flashpoint.
Major Application :cleaning products
cosmetics
environmental
flavors and fragrances
food and beverages
personal care Cosmetics Ingredients Functions :PERFUMING
InChI :1S/C4H6O2/c1-3(5)4(2)6/h1-2H3
InChIKey :QSJXEFYPDANLFS-UHFFFAOYSA-N
SMILES :CC(=O)C(C)=O
LogP :-1.340
CAS DataBase Reference :431-03-8(CAS DataBase Reference)
NIST Chemistry Reference :2,3-Butanedione(431-03-8)
EPA Substance Registry System :2,3-Butanedione (431-03-8)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501 H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310 H331 Toxic if inhaled Acute toxicity,inhalation Category 3 Danger P261, P271, P304+P340, P311, P321,P403+P233, P405, P501 H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501 H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501 H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501
Precautionary statements:	P201 Obtain special instructions before use. P202 Do not handle until all safety precautions have been read and understood. P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P240 Ground/bond container and receiving equipment. P241 Use explosion-proof electrical/ventilating/lighting/…/equipment. P242 Use only non-sparking tools. P243 Take precautionary measures against static discharge. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P280 Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P333+P313 IF SKIN irritation or rash occurs: Get medical advice/attention. P370+P378 In case of fire: Use … for extinction. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P403+P235 Store in a well-ventilated place. Keep cool. P405 Store locked up. P501 Dispose of contents/container to..…