Clenbuterol hydrochloride

Also known as: Spiropent, Ventipulmin, NAB 365, Clenbuterol HCl, 4-amino-alpha-((tert-butylamino)methyl)-3,5-dichlorobenzyl alcohol hydrochloride, Benzenemethanol, 4-amino-3,5-dichloro-α-[[(1,1-dimethylethyl)amino]methyl]-, hydrochloride (1:1)

Clenbuterol hydrochloride (CAS 21898-19-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H19Cl3N2O and a molecular weight of 313.651 g/mol. Key properties include a melting point of 174-175.5°C, a boiling point of 404.9ºC at 760 mmHg, a density of 1.25g/cm3 and a flash point of 198.7ºC. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 21898-19-1
Jingsj CID: J-48253-2
Molecular Formula: C₁₂H₁₉Cl₃N₂O
Molecular Weight: 313.651 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	174-175.5°C
Boiling Point	404.9ºC at 760 mmHg
Density	1.25g/cm3
Flash Point	198.7ºC
Exact Mass	312.056305
PSA	58.28000
LogP	4.77120

GHS Safety & Compliance

Acute ToxicitySignal word: Danger

H301 — Toxic if swallowed

Activity & Biological Data

Additional Information	[1]. Kim HK, et al. Effect of clenbuterol on apoptosis, adipogenesis, and lipolysis in adipocytes.J PhysiolBiochem. 2010 Sep;66(3):197-203. [2]. Hoshino D, et al. Clenbuterol, a β2-adrenergic agonist, reciprocally alters PGC-1 alpha and RIP140 and reduces fatty acid and pyruvate oxidation in rat skeletal muscle.Am J PhysiolRegulIntegr Comp Physiol. 2012 Feb 1;302(3):R373-84. [3]. O'Donnell JM, et al. Effects of clenbuterol and antidepressant drugs on beta adrenergic receptor/N-protein coupling in the cerebral cortex of the rat.J PharmacolExpTher. 1985 Jul;234(1):30-6. [4]. Gon?alves DA, et al. Clenbuterol suppresses proteasomal and lysosomal proteolysis and atrophy-related genes in denervated rat soleus muscles independently of Akt.Am J PhysiolEndocrinolMetab. 2012 Jan 1;302(1):E123-33.

Additional Information

[1]. Kim HK, et al. Effect of clenbuterol on apoptosis, adipogenesis, and lipolysis in adipocytes.J PhysiolBiochem. 2010 Sep;66(3):197-203. [2]. Hoshino D, et al. Clenbuterol, a β2-adrenergic agonist, reciprocally alters PGC-1 alpha and RIP140 and reduces fatty acid and pyruvate oxidation in rat skeletal muscle.Am J PhysiolRegulIntegr Comp Physiol. 2012 Feb 1;302(3):R373-84. [3]. O'Donnell JM, et al. Effects of clenbuterol and antidepressant drugs on beta adrenergic receptor/N-protein coupling in the cerebral cortex of the rat.J PharmacolExpTher. 1985 Jul;234(1):30-6. [4]. Gon?alves DA, et al. Clenbuterol suppresses proteasomal and lysosomal proteolysis and atrophy-related genes in denervated rat soleus muscles independently of Akt.Am J PhysiolEndocrinolMetab. 2012 Jan 1;302(1):E123-33.

Customs & Trade Information

HS Code	2922199020
Summary	2922199020. VAT:17.0%. Tax rebate rate:9.0%. Supervision conditions:l(Drug import and export permit). MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Clenbuterol hydrochloride?

The CAS number of Clenbuterol hydrochloride is 21898-19-1.

What are the molecular formula and molecular weight of Clenbuterol hydrochloride?

Clenbuterol hydrochloride has molecular formula C12H19Cl3N2O and molecular weight 313.651 g/mol.

Is Clenbuterol hydrochloride hazardous?

Clenbuterol hydrochloride has GHS signal word Danger and hazard statements H301 — Toxic if swallowed.

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. "Clenbuterol hydrochloride (CAS 21898-19-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48253-2 (accessed 2026-11-06).

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