Xanthopterin

Also known as: 2-amino-1,5-dihydro-4,6-pteridinedione, 2-aminopteridine-4,6-diol, 2-amino-3,5-dihydropteridine-4,6-dione, 2-amino-4,6(1H,5H)-pteridinedione, 2-aminopteridine-4(3H),6(5H)-dione, 2-azanyl-1,5-dihydropteridine-4,6-dione, Uropterin, xanthopterine

Xanthopterin (CAS 119-44-8) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C6H5N5O2 and a molecular weight of 179.136 g/mol. Key properties include a melting point of 410ºC, a boiling point of 686.5ºC at 760mmHg, a density of 2.2±0.1 g/cm3 and a flash point of 369ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 119-44-8
Jingsj CID: J-9861-3
Molecular Formula: C₆H₅N₅O₂
Molecular Weight: 179.136 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	410ºC
Boiling Point	686.5ºC at 760mmHg
Density	2.2±0.1 g/cm3
Flash Point	369ºC
Exact Mass	179.044327
PSA	117.52000
LogP	-3.90
Refractive Index	1.992
Storage Conditions	2-8°C

Activity & Biological Data

Additional Information	[1]. Xanthopterin (XPT), an unconjugated pteridine compound, affects cell growth and differentiation. When injected into rats, XPT has caused changes that have been interpreted as renal growth and hypertrophy. [2]. Lord JL, et al. Cytotoxicity of xanthopterin and isoxanthopterin in MCF-7 cells. Cancer Lett. 2005 May 10;222(1):119-24. [3]. Plotkin M, et al. Xanthopterin in the Oriental hornet (Vespa orientalis): light absorbance is increased with maturation of yellow pigment granules. Photochem Photobiol. 2009 Jul-Aug;85(4):955-61. [4]. Ziegler I, et al. Pterins and the regulation of lymphocyte activation on the mode of xanthopterin action. Hoppe Seylers Z Physiol Chem. 1984 Jun;365(6):667-73.

Additional Information

[1]. Xanthopterin (XPT), an unconjugated pteridine compound, affects cell growth and differentiation. When injected into rats, XPT has caused changes that have been interpreted as renal growth and hypertrophy. [2]. Lord JL, et al. Cytotoxicity of xanthopterin and isoxanthopterin in MCF-7 cells. Cancer Lett. 2005 May 10;222(1):119-24. [3]. Plotkin M, et al. Xanthopterin in the Oriental hornet (Vespa orientalis): light absorbance is increased with maturation of yellow pigment granules. Photochem Photobiol. 2009 Jul-Aug;85(4):955-61. [4]. Ziegler I, et al. Pterins and the regulation of lymphocyte activation on the mode of xanthopterin action. Hoppe Seylers Z Physiol Chem. 1984 Jun;365(6):667-73.

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. 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 Xanthopterin?

The CAS number of Xanthopterin is 119-44-8.

What are the molecular formula and molecular weight of Xanthopterin?

Xanthopterin has molecular formula C6H5N5O2 and molecular weight 179.136 g/mol.

What are the upstream and downstream products of Xanthopterin?

For Xanthopterin, Upstream Products: Leucopterin; Downstream Products: Leucopterin, Ammelide, Glycine.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Xanthopterin (CAS 119-44-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-9861-3 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.