甲基乙炔（CAS 74-99-7）：分子式 C3H4、分子量 40.06。
| CAS号 | 74-99-7 |
|---|---|
| 分子式 | C3H4 |
| 分子量 | 40.06 |
| 熔点 | -153 °F (NIOSH, 2024) |
| 沸点 | -10 °F at 760 mmHg (NIOSH, 2024) |
| LogP | 0.9 |
| 应用领域 | Uses: Used as a welding fuel and chemical intermediate、[ACGIH]、Gas Welding and Cutting [Category: Weld]、... Propyne is used as a welding torch fuel、as a specialty fuel、and chemical intermediate.、Industry Uses: Intermediate、Other、Consumer Uses: Intermediate、Methods of Manufacturing: Thermal or catalytic pyrolysis of propene、Propyne and propadiene can be recovered from cracked gas by solvent extraction.、In ethylene plants ... removed by selective hydrogenation of the C3 stream after it has been separated from heavier hydrocarbons.、U.S. Production: 2023: 1、000、000 - <8、500、000 lb、2022: 1、2021: 1、2020: 1、This chemical is listed as a High Production Volume (HPV) (65FR81686). Chemicals listed as HPV were produced in or imported into the U.S. in >1 million pounds in 1990 and、or 1994. The HPV list is based on the 1990 Inventory Update Rule. (IUR) (40 CFR part 710 subpart B、51FR21438).、Production volumes for non-confidential chemicals reported under the Inventory Update Rule. [Table#3932]、General Manufacturing Information: Petrochemical Manufacturing、1-Propyne: ACTIVE |
登记用途：Uses: Used as a welding fuel and chemical intermediate、[ACGIH]、Gas Welding and Cutting [Category: Weld]、... Propyne is used as a welding torch fuel、as a specialty fuel、and chemical intermediate.、Industry Uses: Intermediate、Other、Consumer Uses: Intermediate、Methods of Manufacturing: Thermal or catalytic pyrolysis of propene、Propyne and propadiene can be recovered from cracked gas by solvent extraction.、In ethylene plants ... removed by selective hydrogenation of the C3 stream after it has been separated from heavier hydrocarbons.、U.S. Production: 2023: 1、000、000 - <8、500、000 lb、2022: 1、2021: 1、2020: 1、This chemical is listed as a High Production Volume (HPV) (65FR81686). Chemicals listed as HPV were produced in or imported into the U.S. in >1 million pounds in 1990 and、or 1994. The HPV list is based on the 1990 Inventory Update Rule. (IUR) (40 CFR part 710 subpart B、51FR21438).、Production volumes for non-confidential chemicals reported under the Inventory Update Rule. [Table#3932]、General Manufacturing Information: Petrochemical Manufacturing、1-Propyne: ACTIVE。
甲基乙炔 是一种化工化合物，登记 CAS 号为 74-99-7，分子式 C3H4（分子量 40.06）。
登记 CAS 号：74-99-7
其分子式 C3H4 由 3 个碳、4 个氢 组成。
别名/同义词：甲基乙炔 · Methylacetylene
甲基乙炔 的 CAS 登记号为 74-99-7。
分子式 C3H4，分子量 40.06。
别名/同义词：甲基乙炔、Methylacetylene。
登记用途：Uses: Used as a welding fuel and chemical intermediate、[ACGIH]、Gas Welding and Cutting [Category: Weld]、... Propyne is used as a welding torch fuel、as a specialty fuel、and chemical intermediate.、Industry Uses: Intermediate、Other、Consumer Uses: Intermediate、Methods of Manufacturing: Thermal or catalytic pyrolysis of propene、Propyne and propadiene can be recovered from cracked gas by solvent extraction.、In ethylene plants ... removed by selective hydrogenation of the C3 stream after it has been separated from heavier hydrocarbons.、U.S. Production: 2023: 1、000、000 - <8、500、000 lb、2022: 1、2021: 1、2020: 1、This chemical is listed as a High Production Volume (HPV) (65FR81686). Chemicals listed as HPV were produced in or imported into the U.S. in >1 million pounds in 1990 and、or 1994. The HPV list is based on the 1990 Inventory Update Rule. (IUR) (40 CFR part 710 subpart B、51FR21438).、Production volumes for non-confidential chemicals reported under the Inventory Update Rule. [Table#3932]、General Manufacturing Information: Petrochemical Manufacturing、1-Propyne: ACTIVE。
甲基乙炔（CAS 74-99-7）的独立参考数据，整理自公开化学数据库。
| CAS Registry Number | 74-99-7 |
|---|---|
| PubChem CID | 6335 |
| Molecular formula | C3H4 |
| IUPAC name | prop-1-yne |
| UNII (FDA) | 086L40ET1B |
| Molecular Weight | 40.06 |
|---|---|
| XLogP3 | 0.9 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 0 |
| Rotatable Bond Count | 0 |
| Exact Mass | 40.0313001276 |
| Monoisotopic Mass | 40.0313001276 |
| Topological Polar Surface Area | 0 |
| Heavy Atom Count | 3 |
| Boiling Point | -10 °F at 760 mmHg (NIOSH, 2024) |
|---|---|
| Boiling Point | -23.2 °C |
| Boiling Point | -10 °F |
| Boiling Point | -23.3 °C @760 [mm Hg] |
| Melting Point | -153 °F (NIOSH, 2024) |
| Melting Point | -102.7 °C |
| Melting Point | -153 °F |
| Solubility | In water, 3,640 mg/L at 25 °C |
| Density | 0.607 at 25 °C/4 °C |
| Density | .607 (p> 1 atm) |
Propyne; Methylacetylene; prop-1-yne; 1-PROPYNE; Allylene; 74-99-7; Methyl acetylene; Acetylene, methyl-; 086L40ET1B; DTXSID0026387; CHEBI:48086; RefChem:6178; DTXCID406387; 200-828-4; METHYLACETYLENE-D1; MFCD00036235
| Reported hazard statements | H220 (98.8%), H280 (100%), H335 (52.9%), H336 (34.7%) |
|---|
H220 (98.8%): Extremely flammable gas [Danger Flammable gases]
H280 (100%): Contains gas under pressure; may explode if heated [Warning Gases under pressure]
Methylacetylene · CAS 74-99-7 · C3H4. UNII 086L40ET1B. Boiling Point: -10 °F at 760 mmHg (NIOSH, 2024); Boiling Point: -23.2 °C; Boiling Point: -10 °F.
数据来源：PubChem / Wikidata；与随货 COA 不一致时以 COA 为准。
English page: Methylacetylene