Name | 2-Acetylthiophene |
Synonyms | AKOS 91936 2-ACETYLTHIOLE 2-ACETOTHIOPHENE AKOS BBS-00000940 2-ACETYLTHIOPHENE 2-Acetylthiophene LABOTEST-BB LT01593557 METHYL 2-THIENYL KETONE 1-(2-THIENYL)ETHAN-1-ONE |
CAS | 88-15-3 |
EINECS | 201-804-6 |
InChI | InChI=1/C6H6OS/c1-5(7)6-3-2-4-8-6/h2-4H,1H3 |
Molecular Formula | C6H6OS |
Molar Mass | 126.18 |
Density | 1.142g/cm3 |
Melting Point | 10-11℃ |
Boling Point | 212.6°C at 760 mmHg |
Flash Point | 82.4°C |
Vapor Presure | 0.172mmHg at 25°C |
Storage Condition | 2-8℃ |
Refractive Index | 1.54 |
MDL | MFCD00005442 |
Physical and Chemical Properties | Density 1.16 melting point 10-11°C boiling point 214°C refractive index 1.564-1.568 flash point 91°C |
Use | Used as a drug Intermediate |
Hazard Symbols | T - Toxic |
Risk Codes | R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. |
Safety Description | S28 - After contact with skin, wash immediately with plenty of soap-suds. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S38 - In case of insufficient ventilation, wear suitable respiratory equipment. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
UN IDs | UN 2810 6.1/PG 2 |
WGK Germany | 3 |
RTECS number | OB6300000 |
F | 13 |
auto-ignition temperature | 265°C DIN 51794 |
Hazard Note | Irritant |
TSCA | Yes |
HazardClass | 6.1 |
PackingGroup | II |
customs code | 29349990 |
Toxicity | LD50 orally in Rabbit: 25 - 200 mg/kg LD50 dermal Rat 370 mg/kg |
storage conditions | Store below 30°C. |
solubility | 14g/l |
morphology | Liquid |
color | Clear pale yellow to light brown |
water solubility | Insoluble in water. |
sensitivity | Light Sensitive |
BRN | 107910 |
InChIKey | WYJOVVXUZNRJQY-UHFFFAOYSA-N |
NIST chemical information | Ethanone, 1-(2-thienyl)-(88-15-3) |
EPA chemical information | Ethanone, 1-(2-thienyl)- (88-15-3) |
production method
thiophene reacts with acetic anhydride in the presence of phosphoric acid. acetic anhydride, 85% phosphoric acid and thiophene are put into the reaction pot, stirred, gradually heated to the reflux temperature (96-97 ℃), kept under reflux for 2.5h, cooled, washed with water, and separated into water layer. Distillate the obtained oil layer under normal pressure and then under reduced pressure, collect the evaporated material, stand still, divide the water layer, and recover the thiophene for the next batch of feeding and reuse. The oil remaining in the pot is distilled under reduced pressure and the fraction at 89-90 ℃(1.33kPa) is collected to obtain the finished product. 85.7% yield. A similar method is the reaction of thiophene and acetyl chloride. This reaction is carried out in the presence of tin tetrachloride.
category
flammable liquids
toxicity classification
High toxicity
acute toxicity
intravenous-mouse LD50: 40 mg/kg
flammability hazard characteristics
Flammable; heat decomposition releases toxic nitrogen oxides and sulfur oxide smoke
storage and transportation features
Warehouse ventilation and low temperature drying
fire extinguishing agent
Dry powder, foam, sand, carbon dioxide, mist water