Ascomycin

长川霉素

Also known as: FK520, FR-900520, Immunomycin, L-683590, Tacrolimus USP Related Compound A, WS-7238A, NSC 106410, Ascomycin solution, changchuanmycin, (1R,9S,12S,13R,14S,17R,18E,21S,23S,24R,25S,27R)-17-Ethyl-1,14-dihydroxy-12-{(1E)-1-[(1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl]prop-1-en-2-yl}-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.0]octacos-18-ene-2,3,10,16-tetrone

Ascomycin (CAS 104987-12-4) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C43H69NO12 and a molecular weight of 792.008 g/mol. It is also known as FK520, FR-900520 and Immunomycin. Key properties include a melting point of 153-157ºC, a boiling point of 868.3±75.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 478.9±37.1 °C. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 104987-12-4
Jingsj CID: J-27374-3
Molecular Formula: C₄₃H₆₉NO₁₂
Chinese Name: 长川霉素
Molecular Weight: 792.008 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	153-157ºC
Boiling Point	868.3±75.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	478.9±37.1 °C

GHS Safety & Compliance

Flammable / IrritantSignal word: Danger

Frequently Asked Questions

What is the CAS number of Ascomycin?

The CAS number of Ascomycin is 104987-12-4.

What are the molecular formula and molecular weight of Ascomycin?

Ascomycin has molecular formula C43H69NO12 and molecular weight 792.008 g/mol.

Is Ascomycin hazardous?

Ascomycin has GHS signal word Danger.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Ascomycin (CAS 104987-12-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-27374-3 (accessed 2026-10-23).

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