Methylacetylene (CAS 74-99-7) — formula C3H4, molecular weight 40.06; category organic chemicals.
| CAS Number | 74-99-7 |
|---|---|
| Molecular Formula | C3H4 |
| Molecular Weight | 40.06 |
| Melting Point | -153 °F (NIOSH, 2024) |
| Boiling Point | -10 °F at 760 mmHg (NIOSH, 2024) |
| LogP | 0.9 |
| Category | Organic Chemicals |
Methylacetylene is a carbon-based organic compound with CAS registry number 74-99-7 and molecular formula C3H4 (molecular weight 40.06), belonging to the organic chemicals segment of chemical raw materials.
CAS number: 74-99-7
Its molecular formula C3H4 comprises 3 C, 4 H atoms.
Also known as: Methylacetylene · 甲基乙炔
Category: organic chemicals
The CAS registry number of Methylacetylene is 74-99-7.
Molecular formula C3H4, molecular weight 40.06.
It is also registered under: Methylacetylene, 甲基乙炔.
Category: Organic Chemicals.
Independent reference data for Methylacetylene (CAS 74-99-7), compiled from public chemistry databases.
| 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.
Source: PubChem / Wikidata; the batch COA governs where values differ.
Supplier: Jinan Shenghe Chemical Co., Ltd.
中文页面: 甲基乙炔