Reactive Blue 2

活性蓝2

Also known as: Cibacron Blue 3G-A, Procion Blue HB, Procion Blue HBS, Cibacron Blue F3GA, C.I. Reactive Blue 2, Kayacion Blue A-B, Basilen Blue E-3G, cibacron blue

Reactive Blue 2 (CAS 12236-82-7) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C29H20ClN7O11S3 and a molecular weight of 774.15700 g/mol. It is also known as Cibacron Blue 3G-A, Procion Blue HB and Procion Blue HBS. Key properties include a melting point of >300ºC and a density of 1.845 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 12236-82-7
Jingsj CID: J-1975400-6
Molecular Formula: C₂₉H₂₀ClN₇O₁₁S₃
Chinese Name: 活性蓝2
Molecular Weight: 774.15700 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	>300ºC
Density	1.845 g/cm3
Exact Mass	773.00700
PSA	323.17000
LogP	7.89610
Refractive Index	1.777
Additional Property	H2O: soluble

Activity & Biological Data

Additional Information	[1]. Okuda A, et al. Reactive blue 2 induces calcium oscillations in HeLa cells. Jpn J Physiol. 2001 Jun;51(3):389-93. [2]. Lee JH, et al. Reactive blue 2, an antagonist of rat P2Y4, increases K+ secretion in rat cochlea strial marginal cells. Hear Res. 2006 Sep;219(1-2):66-73. [3]. Coughlan SJ, et al. Reactive blue 2 is a potent inhibitor of a thylakoid protein kinase. Eur J Biochem. 1991 Apr 23;197(2):467-71. [4]. Burnstock G, et al. P2-purinoceptors of two subtypes in the rabbit mesenteric artery: reactive blue 2 selectively inhibits responses mediated via the P2y-but not the P2x-purinoceptor. Br J Pharmacol. 1987 Feb;90(2):383-91. [5]. Uneyama H, et al. Suramin and reactive blue 2 are antagonists for a newly identified purinoceptor on rat megakaryocyte. Br J Pharmacol. 1994 Jan;111(1):245-9.

Additional Information

[1]. Okuda A, et al. Reactive blue 2 induces calcium oscillations in HeLa cells. Jpn J Physiol. 2001 Jun;51(3):389-93. [2]. Lee JH, et al. Reactive blue 2, an antagonist of rat P2Y4, increases K+ secretion in rat cochlea strial marginal cells. Hear Res. 2006 Sep;219(1-2):66-73. [3]. Coughlan SJ, et al. Reactive blue 2 is a potent inhibitor of a thylakoid protein kinase. Eur J Biochem. 1991 Apr 23;197(2):467-71. [4]. Burnstock G, et al. P2-purinoceptors of two subtypes in the rabbit mesenteric artery: reactive blue 2 selectively inhibits responses mediated via the P2y-but not the P2x-purinoceptor. Br J Pharmacol. 1987 Feb;90(2):383-91. [5]. Uneyama H, et al. Suramin and reactive blue 2 are antagonists for a newly identified purinoceptor on rat megakaryocyte. Br J Pharmacol. 1994 Jan;111(1):245-9.

Frequently Asked Questions

What is the CAS number of Reactive Blue 2?

The CAS number of Reactive Blue 2 is 12236-82-7.

What are the molecular formula and molecular weight of Reactive Blue 2?

Reactive Blue 2 has molecular formula C29H20ClN7O11S3 and molecular weight 774.15700 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. "Reactive Blue 2 (CAS 12236-82-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1975400-6 (accessed 2026-10-28).

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