Ethoxyethyne
ethyl ethynyl ether
CAS: 927-80-0
Molecular Formula: C4H6O
Ethoxyethyne - Names and Identifiers
| Name | ethyl ethynyl ether |
| Synonyms | Ethoxyethyne ethyl ethynyl ether Ethynyl ethyl ether |
| CAS | 927-80-0 |
| EINECS | 213-164-5 |
| InChI | InChI=1/C4H6O/c1-3-5-4-2/h1H,4H2,2H3 |
Ethoxyethyne - Physico-chemical Properties
| Molecular Formula | C4H6O |
| Molar Mass | 70.09 |
| Density | 0.732g/mLat 25°C |
| Boling Point | 53°C |
| Flash Point | −20°F |
| Water Solubility | Slightly miscible with water. |
| Vapor Presure | 337mmHg at 25°C |
| Exposure Limit | ACGIH: TWA 50 ppm (Skin)OSHA: TWA 500 ppm(1800 mg/m3)NIOSH: IDLH 1100 ppm; TWA 50 ppm(180 mg/m3) |
| BRN | 741882 |
| Storage Condition | 2-8°C |
| Refractive Index | n20/D 1.379 |
Ethoxyethyne - Risk and Safety
| Risk Codes | R11 - Highly Flammable R38 - Irritating to the skin R48/20 - R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R62 - Possible risk of impaired fertility R65 - Harmful: May cause lung damage if swallowed R67 - Vapors may cause drowsiness and dizziness R36/37/38 - Irritating to eyes, respiratory system and skin. R36/38 - Irritating to eyes and skin. |
| Safety Description | S16 - Keep away from sources of ignition. S36/37 - Wear suitable protective clothing and gloves. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S33 - Take precautionary measures against static discharges. S29 - Do not empty into drains. S9 - Keep container in a well-ventilated place. |
| UN IDs | UN 1993 3/PG 2 |
| WGK Germany | 3 |
| RTECS | KN9900000 |
| HS Code | 29091990 |
| Hazard Note | Highly Flammable/Keep Cold |
| Hazard Class | 3 |
| Packing Group | II |
Ethoxyethyne - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| production method | 1. Chloroacetaldehyde diethanol is added to a solution of sodium amino acid in liquid ammonia to produce sodium ethoxyacetylene, which is prepared by treatment with an aqueous solution of sodium chloride at -70 °c. 2. Preparation method: 500mL of dry liquid ammonia was introduced into the reaction bottle, 1.65g of hydrated ferric nitrate was added, and then 38g (mol) of clean, freshly cut metal sodium was added in portions until the sodium amino acid reaction was completed. Chloroacetal (2)76.5(0.502mol) was added dropwise in 15~20min, shaken for 15min, and nitrogen was slowly introduced to volatilize ammonia. Cool to -70 °c with a dry ice-trichloroethane solution bath and immediately add 325ml of saturated sodium chloride solution previously cooled to -20 °c with shaking as much as possible. A distillation head was fitted and neutralized with dry ice-cooling to -70 °c by dropwise addition of saturated sodium dihydrogen phosphate solution. The water layer was frozen by cooling with dry ice. The supernatant liquid was decanted, dried with anhydrous calcium chloride, fractionated, and fractions of 49-50 °c/99.62KPA were collected to obtain 20-21g of ethoxyacetylene (1) in a yield of 58%-61%. [1] |
Last Update：2024-04-09 21:04:16
