BUTYROYL CHLORIDE
Butyryl chloride
CAS: 141-75-3
Molecular Formula: C4H7ClO
BUTYROYL CHLORIDE - Names and Identifiers
| Name | Butyryl chloride |
| Synonyms | Butyryl chloride BUTYRYL CHLORIDE Butanoyl chloride BUTYROYL CHLORIDE BUTANOYL CHLORIDE N-BUTYRYL CHLORIDE N-BUTYROYL CHLORIDE N-BUTANOYL CHLORIDE BUTYRIC ACID CHLORIDE Butyric acid chloride N-BUTYRIC ACID CHLORIDE |
| CAS | 141-75-3 |
| EINECS | 205-498-5 |
| InChI | InChI=1/C4H7ClO/c1-2-3-4(5)6/h2-3H2,1H3 |
| InChIKey | DVECBJCOGJRVPX-UHFFFAOYSA-N |
BUTYROYL CHLORIDE - Physico-chemical Properties
| Molecular Formula | C4H7ClO |
| Molar Mass | 106.55 |
| Density | 1.026g/mLat 25°C(lit.) |
| Melting Point | −89°C(lit.) |
| Boling Point | 102°C(lit.) |
| Flash Point | 71°F |
| Water Solubility | decomposes |
| Solubility | Miscible with ether. |
| Vapor Presure | 39 hPa (20 °C) |
| Vapor Density | 3.7 (vs air) |
| Appearance | Liquid |
| Color | Clear slightly yellow |
| Merck | 14,1598 |
| BRN | 605395 |
| Storage Condition | Store below +30°C. |
| Sensitive | Moisture Sensitive |
| Explosive Limit | 2.5-7.3%(V) |
| Refractive Index | n20/D 1.412(lit.) |
| Physical and Chemical Properties | Character: colorless transparent liquid with pungent odor of hydrochloric acid. boiling point 102 ℃ freezing point -89 ℃ relative density 1.0277 refractive index 1.4121 flash point <21 ℃ solubility is miscible with ether. |
| Use | Used in medicine, pesticide, flame retardant, water purification agent |
BUTYROYL CHLORIDE - Risk and Safety
| Risk Codes | R11 - Highly Flammable R34 - Causes burns |
| Safety Description | S16 - Keep away from sources of ignition. S23 - Do not breathe vapour. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 2353 3/PG 2 |
| WGK Germany | 1 |
| RTECS | EM0595000 |
| FLUKA BRAND F CODES | 13 |
| TSCA | Yes |
| HS Code | 2915 90 70 |
| Hazard Class | 3 |
| Packing Group | II |
BUTYROYL CHLORIDE - Upstream Downstream Industry
| Raw Materials | Acetone Acetone n-Butyric acid n-Butyric acid |
| Downstream Products | Decamethrin Esfenvalerate |
BUTYROYL CHLORIDE - Nature
Open Data Verified Data
A colorless transparent liquid having an irritating odor of hydrochloric acid. The relative density was 1. 0277. Freezing point -89 °c. Boiling point 102 °c (look kPa). Refractive index 4121. Miscible with ether. Decomposition in water or alcohol. This product is flammable, corrosive and toxic. Flash point <21 °c.
Last Update：2025-06-10 22:55:16
BUTYROYL CHLORIDE - Preparation Method
Open Data Verified Data
with butyric acid as raw material, with thionyl chloride chlorination (butyric acid: thionyl chloride -1:1.587) to butyryl chloride, reaction products often pressure distillation, collecting 95~115 deg C fraction, the finished product was obtained.
Last Update：2022-01-01 10:32:22
BUTYROYL CHLORIDE - Application
Open Data Verified Data
It is used in organic synthesis, and is used in medicine to synthesize uric acid.
Last Update：2025-08-19 16:24:40
BUTYROYL CHLORIDE - Safety
Open Data Verified Data
- This product is toxic. Swallowing and absorption are highly toxic and have strong tissue irritation. Production equipment should be sealed to prevent leakage. The site should have good ventilation conditions. Operators should wear protective equipment.
- packaging in glass bottles shall be closed. Storage in a cool and ventilated place, rain water, moisture, sun protection, anti-impact. According to the provisions of toxic substances storage and transportation.
Last Update：2025-06-10 22:55:16
BUTYROYL CHLORIDE - Reference Information
| freezing point | -89 ℃ |
| LogP | 0.51 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | used in organic synthesis butyryl chloride is the herbicide raffinidine, triphenyloxalone, an intermediate of thioxanthone. organic synthesis intermediate, used in the preparation of styrene-butadiene and drug-induced uric acid, qiangtongidine and the intermediate 2-ethyl-1, 3-cyclopentanedione. used in medicine, pesticide, flame retardant, water purifying agent, etc. |
| production method | 1. From the reaction of butyric acid and thionyl chloride. Heating thionyl chloride to reflux, adding butyric acid Dropwise, adding it over about 4H, refluxing for 1H, distilling, collecting 95-115 ℃ fraction, redistilling once, collecting 101-105 ℃ fraction to obtain finished product, the yield was more than 70%. Phosphorus trichloride was also incorporated in the reaction in a yield of 75%. Industrial purity is greater than or equal to 99%. Raw material consumption quota: butyric acid 890kg/t, thionyl chloride 600kg/t. The preparation method is to heat the thionyl chloride to reflux in the reactor, add n-butyric acid Dropwise, add it in about 4H, and reflux for 1H, the crude butyryl chloride fraction at 95-115 ° C. Was collected by atmospheric distillation and further distilled to obtain the product. Reaction equation: CH3CH2CH2COCl + SOCl2 → CH3CH2CH2COCl + HCl ++ SO2 |
| spontaneous combustion temperature | 280°C |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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Raw Materials for BUTYROYL CHLORIDE
Downstream Products for BUTYROYL CHLORIDE