4-Ethynyl-1-methylpyrazole
[CAS# 39806-89-8]

Identification

• Name: 4-Ethynyl-1-methylpyrazole
• Synonyms: 4-Ethynyl-1-methyl-1H-pyrazole; 1-Methyl-4-ethynylpyrazole; 4-(N-Methylpyrazolyl)acetylene
• Molecular Formula: C₆H₆N₂
• Molecular Weight: 106.13
• CAS Registry Number: 39806-89-8
• EC Number: 800-860-4

Properties

• Solubility: Sparingly soluble (12 g/L) (25 ºC), Calc.^*
• Density: 0.93±0.1 g/cm³ (20 ºC 760 Torr), Calc.^*
• Boiling point: 181.7±13.0 ºC (760 Torr), Calc.^*
• Flash point: 63.7±19.8 ºC, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2019 ACD/Labs)

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Specific target organ toxicity - single exposure	STOT SE	3	H335
Skin irritation	Skin Irrit.	2	H315
Acute toxicity	Acute Tox.	4	H302
Eye irritation	Eye Irrit.	2A	H319