5-Hex-1-ynylnicotinic acid

5-己炔烟酸

Also known as: 5-(1-Hexyn-1-yl)-3-pyridinecarboxylic acid, 5-Hex-1-ynylpyridine-3-carboxylic acid, 3-Pyridinecarboxylic acid, 5-(1-hexyn-1-yl)-, 5-Hex-1-ynylnicotinc acid, 5-hex-1-ynylpyridine-3-carboxylic acid, BUTTPARK 46\04-53, HMS1666G05

5-Hex-1-ynylnicotinic acid (CAS 306935-31-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H13NO2 and a molecular weight of 203.23700 g/mol. It is also known as 5-(1-Hexyn-1-yl)-3-pyridinecarboxylic acid, 5-Hex-1-ynylpyridine-3-carboxylic acid and 3-Pyridinecarboxylic acid, 5-(1-hexyn-1-yl)-. Key properties include a melting point of 142ºC, a boiling point of 387.5ºC at 760mmHg, a density of 1.15g/cm3 and a flash point of 188.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 306935-31-9
Jingsj CID: J-1138388-2
Molecular Formula: C₁₂H₁₃NO₂
Chinese Name: 5-己炔烟酸
Molecular Weight: 203.23700 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	142ºC
Boiling Point	387.5ºC at 760mmHg
Density	1.15g/cm3
Flash Point	188.2ºC
Exact Mass	203.09500
PSA	50.19000
LogP	2.32150
Refractive Index	1.558

Customs & Trade Information

HS Code	2933399090
Summary	2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 5-Hex-1-ynylnicotinic acid?

The CAS number of 5-Hex-1-ynylnicotinic acid is 306935-31-9.

What are the molecular formula and molecular weight of 5-Hex-1-ynylnicotinic acid?

5-Hex-1-ynylnicotinic acid has molecular formula C12H13NO2 and molecular weight 203.23700 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "5-Hex-1-ynylnicotinic acid (CAS 306935-31-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1138388-2 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.