Name | 2,5-Hexanedione |
Synonyms | NSC 7621 2,5-Hexadione Hexan-2,5-Dion Acetonylacetone 2,5-Hexanedione 2,5-Dioxohexane hexane-2,5-dione 2,5-Diketohexane Acetone, acetonyl- 2,5-Hexanedione, Standard f GC Acetonyl acetone 2,5-hexanedione |
CAS | 110-13-4 |
EINECS | 203-738-3 |
InChI | InChI=1/C6H10O2/c1-5(7)3-4-6(2)8/h3-4H2,1-2H3 |
InChIKey | OJVAMHKKJGICOG-UHFFFAOYSA-N |
Molecular Formula | C6H10O2 |
Molar Mass | 114.14 |
Density | 0.973 g/mL at 25 °C (lit.) |
Melting Point | -6--5 °C (lit.) |
Boling Point | 191 °C (lit.) |
Specific Rotation(α) | n20/D 1.425 (lit.) |
Flash Point | 174°F |
Water Solubility | miscible |
Solubility | It can be miscible with water and ethanol ether, not with hydrocarbon solvents. |
Vapor Presure | 0.43 mm Hg ( 20 °C) |
Appearance | Transparent light brown liquid |
Color | Clear yellow to brown |
Merck | 14,71 |
BRN | 506525 |
PH | 6.1 (10g/l, H2O, 20℃) |
Storage Condition | Store below +30°C. |
Stability | Stable. Incompatible with strong bases, strong reducing agents, strong oxidizing agents. Flammable. |
Explosive Limit | 1.5%(V) |
Refractive Index | n20/D 1.425(lit.) |
MDL | MFCD00008792 |
Physical and Chemical Properties | Colorless liquid. Melting Point -5.5 ℃, boiling point 194 ℃(100.5kPa),89 ℃(3.33kPa), relative density 0.9737(20/4 ℃), refractive index 1.4421. Can be miscible with water, ethanol, ether. It gradually turned yellow after long-standing. |
Risk Codes | R36/38 - Irritating to eyes and skin. R48/20/21/22 - R36/37/38 - Irritating to eyes, respiratory system and skin. |
Safety Description | S23 - Do not breathe vapour. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37 - Wear suitable protective clothing and gloves. S37/39 - Wear suitable gloves and eye/face protection |
WGK Germany | 2 |
RTECS | MO3150000 |
FLUKA BRAND F CODES | 8 |
TSCA | Yes |
HS Code | 29141990 |
Toxicity | LD50 orally in rats: 2.7 g/kg (Smyth, Carpenter) |
NIST chemical information | Information provided by: webbook.nist.gov (external link) |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
uses | 2,5-hexandione is an important organic chemical intermediate, which is widely used in the fields of medicine, perfume, pesticide, photographic agent, electroplating and painting, etc. It is used as a high boiling point solvent for synthetic resin, nitro paint, colorant, printing ink, leather tanning agent, rubber vulcanization accelerator, pesticide and pharmaceutical raw material. |
Preparation | Method 1. Shenk et al. used 2, 5-dimethylfuran to oxidize the ring to obtain 3-ene-2, 5-hexandione, and then hydrogenated and reduced to obtain 2, 5-hexandione. method 2. the CA376066 introduces the method of synthesizing 2,5-hexandione by 2,5-dimethylfuran in 90-110 ℃ dilute acid hydrolysis, neutralization of acid and distillation in the reaction solution, with a yield of more than 80%. |
production method | obtained by hydrolysis of 2, 5-dimethylfuran. Another synthesis method is to react sodium acetoacetate with pure iodine to generate diethyl diacetyl succinate, which is then hydrolyzed with 10% sodium hydroxide solution. Use anhydrous potassium carbonate to saturate the reaction liquid and precipitate acetone-based acetone. Extract with ether, after the ether is evaporated from the extract, the residue is distilled, and the fraction at 192-194 ℃ is collected to obtain a colorless product. Foreign commercial products with 97% purity have melting point of -6-5 ℃, boiling point of 191 ℃, relative density of 0.973 and flash point of 78 ℃. |
category | flammable liquid |
toxicity classification | poisoning |
acute toxicity | oral-rat LD50: 2076 mg/kg; Oral-mouse LD50: 2386 mg/kg |
stimulation data | eye-rabbit 100 mg severe |
flammability hazard characteristics | combustible in case of open flame, high temperature and strong oxidant; Combustion emission stimulates smoke |
storage and transportation characteristics | warehouse ventilation and low temperature drying |
fire extinguishing agent | foam, dry powder, carbon dioxide, sand, 1211 |
spontaneous combustion temperature | 400°C |