Vitamin K5

维生素K5

Also known as: 4-Amino-2-methyl-1-naphthol, 1-Naphthalenol, 4-amino-2-methyl-, 1-hydroxy-2-methyl-4-aminonaphthalene, 2-methyl-4-amino-1-hydroxynaphthalene, 2-methyl-4-amino-1-naphthol, 3-methyl-4-hydroxy-1-naphthylamine, 4-Amino-1-hydroxy-2-methyl-naphthalin, 4-Amino-2-methyl-1-naphthalenol, 4-amino-2-methylnaphthalen-1-ol, synkamin, kayvisyn, synkaminbase

Vitamin K5 (CAS 83-70-5) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C11H11NO and a molecular weight of 173.211 g/mol. It is also known as 4-Amino-2-methyl-1-naphthol, 1-Naphthalenol, 4-amino-2-methyl- and 1-hydroxy-2-methyl-4-aminonaphthalene. Key properties include a boiling point of 385.1±30.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 186.7±24.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 83-70-5
Jingsj CID: J-1973778-2
Molecular Formula: C₁₁H₁₁NO
Chinese Name: 维生素K5
Molecular Weight: 173.211 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	385.1±30.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	186.7±24.6 °C
Exact Mass	173.084061
PSA	46.25000
LogP	1.40
Vapor Pressure	0.0±0.9 mmHg at 25°C
Refractive Index	1.712

Activity & Biological Data

Target	IC50: 28 μM (PKM2), 191 μM PKM1, 120 μM (PKL)[2]
Additional Information	[1]. Xu F, et al. Vitamin K5 is an efficient photosensitizer for ultraviolet A light inactivation of bacteria. FEMS Microbiol Lett. 2018 Feb 1;365(4). [2]. Chen J, et al. Vitamin K(3) and K(5) are inhibitors of tumor pyruvate kinase M2. Cancer Lett. 2012 Mar 28;316(2):204-10. [3]. Ogawa M, et al. Vitamins K2, K3 and K5 exert antitumor effects on established colorectal cancer in mice by inducing apoptotic death of tumor cells. Int J Oncol. 2007 Aug;31(2):323-31.

Target

IC50: 28 μM (PKM2), 191 μM PKM1, 120 μM (PKL)[2]

Additional Information

[1]. Xu F, et al. Vitamin K5 is an efficient photosensitizer for ultraviolet A light inactivation of bacteria. FEMS Microbiol Lett. 2018 Feb 1;365(4). [2]. Chen J, et al. Vitamin K(3) and K(5) are inhibitors of tumor pyruvate kinase M2. Cancer Lett. 2012 Mar 28;316(2):204-10. [3]. Ogawa M, et al. Vitamins K2, K3 and K5 exert antitumor effects on established colorectal cancer in mice by inducing apoptotic death of tumor cells. Int J Oncol. 2007 Aug;31(2):323-31.

Customs & Trade Information

HS Code	2922299090
Summary	2922299090. other amino-naphthols and other amino-phenols, other than those containing more than one kind of oxygen function, their ethers and esters; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Vitamin K5?

The CAS number of Vitamin K5 is 83-70-5.

What are the molecular formula and molecular weight of Vitamin K5?

Vitamin K5 has molecular formula C11H11NO and molecular weight 173.211 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. "Vitamin K5 (CAS 83-70-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1973778-2 (accessed 2026-10-28).

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