Coenzyme Q9

辅酶Q9

Also known as: Ubiquinone Q9, Ubiquinone-9, Ubiquinone-45, CoQ9, Q-9, Ubidecarenone Related Compound A, Ubidecarenone impurity D, all-trans-Coenzyme Q9, 2,3-dimethoxy-5-methyl-6-[(2E,6E,10E,14E,18E,22E,26E,30E)-3,7,11,15,19,23,27,31,35-nonamethyl-2,6,10,14,18,22,26,30,34-hexatriacontanonaen-1-yl]-1,4-benzoquinone

Coenzyme Q9 (CAS 303-97-9) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C54H82O4 and a molecular weight of 795.227 g/mol. It is also known as Ubiquinone Q9, Ubiquinone-9 and Ubiquinone-45. Key properties include a melting point of 41-43ºC, a boiling point of 826.8±65.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 314.4±34.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 303-97-9
Jingsj CID: J-46530-8
Molecular Formula: C₅₄H₈₂O₄
Chinese Name: 辅酶Q9
Molecular Weight: 795.227 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	41-43ºC
Boiling Point	826.8±65.0 °C at 760 mmHg
Density	1.0±0.1 g/cm3
Flash Point	314.4±34.3 °C
Exact Mass	794.621338
PSA	52.60000
LogP	18.89
Vapor Pressure	0.0±3.0 mmHg at 25°C
Refractive Index	1.525
Storage Conditions	-20°C

Activity & Biological Data

Target	Human Endogenous Metabolite
Additional Information	[1]. Lekli I, et al. Coenzyme Q9 provides cardioprotection after converting into coenzyme Q10. J Agric Food Chem. 2008 Jul 9;56(13):5331-7. [2]. Venegas C, et al. Determination of coenzyme Q10, coenzyme Q9, and melatonin contents in virgin argan oils: comparison with other edible vegetable oils. J Agric Food Chem. 2011 Nov 23;59(22):12102-8. [3]. García-Corzo L, et al. Dysfunctional Coq9 protein causes predominant encephalomyopathy associated with CoQ deficiency. Hum Mol Genet. 2013 Mar 15;22(6):1233-48.

Target

Human Endogenous Metabolite

Additional Information

[1]. Lekli I, et al. Coenzyme Q9 provides cardioprotection after converting into coenzyme Q10. J Agric Food Chem. 2008 Jul 9;56(13):5331-7. [2]. Venegas C, et al. Determination of coenzyme Q10, coenzyme Q9, and melatonin contents in virgin argan oils: comparison with other edible vegetable oils. J Agric Food Chem. 2011 Nov 23;59(22):12102-8. [3]. García-Corzo L, et al. Dysfunctional Coq9 protein causes predominant encephalomyopathy associated with CoQ deficiency. Hum Mol Genet. 2013 Mar 15;22(6):1233-48.

Frequently Asked Questions

What is the CAS number of Coenzyme Q9?

The CAS number of Coenzyme Q9 is 303-97-9.

What are the molecular formula and molecular weight of Coenzyme Q9?

Coenzyme Q9 has molecular formula C54H82O4 and molecular weight 795.227 g/mol.

What are the upstream and downstream products of Coenzyme Q9?

For Coenzyme Q9, Upstream Products: Solanesol, 2,3-Dimethoxy-5-methyl-1,4-benzenediol; Downstream Products: Coenzyme Q10.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Coenzyme Q9 (CAS 303-97-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-46530-8 (accessed 2026-10-28).

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