ethyne
Phenylacetylene
CAS: 536-74-3
Molecular Formula: C8H6
ethyne - Names and Identifiers
| Name | Phenylacetylene |
| Synonyms | ethyne Ethynylbenzene Phenylacetylene 1-Ethynylbenzene 1-Phenylacetylene Phenylacetylene, pure Ethynylbenzene, Phenylethyne PHENYLACETYLENE FOR SYNTHESIS |
| CAS | 536-74-3 |
| EINECS | 208-645-1 |
| InChI | InChI=1/C8H6/c1-2-8-6-4-3-5-7-8/h1,3-7H |
ethyne - Physico-chemical Properties
| Molecular Formula | C8H6 |
| Molar Mass | 102.133 |
| Density | 0.95g/cm3 |
| Melting Point | -44.8℃ |
| Boling Point | 142.4°C at 760 mmHg |
| Flash Point | 31.1°C |
| Water Solubility | INSOLUBLE |
| Vapor Presure | 7.02mmHg at 25°C |
| Refractive Index | 1.541 |
| Physical and Chemical Properties | Appearance: colorless liquid |
| Use | Used as pharmaceutical intermediates; Organic synthesis |
ethyne - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R10 - Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. R40 - Limited evidence of a carcinogenic effect R65 - Harmful: May cause lung damage if swallowed |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 3295 |
ethyne - Upstream Downstream Industry
ethyne - Nature
| Vapor pressure | 17.6mm Hg ( 37.7 °C) |
| refractive index | n20/D 1.549(lit.) |
| flash point | 88 °F |
| storage conditions | Store at 2°C to 8°C. |
| solubility | H2O: insoluble |
| acidity coefficient (pKa) | 19(at 25℃) |
| morphology | Liquid |
| color | Clear colorless to yellow |
| Specific gravity | 0.930 |
| water solubility | INSOLUBLE |
| sensitivity | Light Sensitive |
| Merck | 14,3861 |
| BRN | 605461 |
| stability | Stable. Flammable. Incompatible with strong oxidizing agents, acids, halogens. |
| NIST chemical information | Phenylacetylene(536-74-3) |
| EPA chemical information | Phenylacetylene (536-74-3) |
Last Update：2024-04-10 22:29:15
ethyne - Security information
| WGK Germany | 1 |
| RTECS number | DA0780000 |
| F | 8-19 |
| TSCA | Y |
| customs code | 2902 90 00 |
| HazardClass | 3 |
| PackingGroup | III |
Last Update：2024-04-10 22:29:15
ethyne - Uses and synthesis methods
application
Phenylacetylene is a hydrocarbon derivative, which can be applied to the following aspects:
1. used in organic synthesis and organic intermediates; 2. used as pharmaceutical intermediates.
chemical properties
colorless liquid. Melting point -44.8 ℃, boiling point 142.4 ℃, flash point 31 ℃, refractive index (nD20)1.5489, relative density (20/4 ℃)0.9300. Miscible with alcohol and ether, insoluble in water.
use
for organic synthesis.
Used as a pharmaceutical intermediate
Commonly used intermediates for asymmetric synthesis, commonly used organic synthesis reagents.
production method
Add β-bromostyrene dropwise to molten potassium hydroxide, and the resulting phenylacetylene is distilled from the reactants. The distillate is stratified, and the upper layer is a water layer. Drying and distilling the oil layer to obtain phenylacetylene.
category
flammable liquids
toxicity classification
Poisoning
acute toxicity
oral-rat LDL0: 4648 mg/kg
flammability hazard characteristics
It is more flammable in case of open flame, high temperature and oxidant; combustion produces stimulating smoke
storage and transportation features
The warehouse is ventilated and dry at low temperature; it is stored separately from oxidants and acids; it is not suitable for long-term storage to prevent polymerization
fire extinguishing agent
Dry powder, dry sand, carbon dioxide, foam, 1211 fire extinguishing agent
Last Update：2024-04-09 18:58:34
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View History
Raw Materials for ethyne
Downstream Products for ethyne
4-PHENYLETHYNYLPHTHALIC ANHYDRIDE
Diphenylacetylene
5-(2-PHENYLETH-1-YNYL)THIOPHENE-2-CARBALDEHYDE
1,2-NAPHTHALIC ANHYDRIDE
4-Phenylpiperidine
(S)-(-)-1-PHENYLETHANOL
Chalcone
4-Methylcumarin
Atropaldehyde
1,2,4,5-tetraphenylbenzene
2-Phenylquinolin-4-ol
L-Homophenylalanine ethyl ester hydrochloride
Diphenylacetylene
5-(2-PHENYLETH-1-YNYL)THIOPHENE-2-CARBALDEHYDE
1,2-NAPHTHALIC ANHYDRIDE
4-Phenylpiperidine
(S)-(-)-1-PHENYLETHANOL
Chalcone
4-Methylcumarin
Atropaldehyde
1,2,4,5-tetraphenylbenzene
2-Phenylquinolin-4-ol
L-Homophenylalanine ethyl ester hydrochloride