WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 317554

CAS#: 1622-61-3

Description: Clonazepam, sold under the brand name Klonopin among others, is an anticonvulsant used to prevent and treat several types of seizures, including myotonic or atonic seizures, photosensitive epilepsy, and absence seizures, panic disorders, and the movement disorder known as akathisia. It is a tranquilizer of the benzodiazepine class. The mechanism of action appears to involve the enhancement of gamma-aminobutyric acid receptor responses. Clonazepam is discontinued.

Chemical Structure

CAS# 1622-61-3

Theoretical Analysis

MedKoo Cat#: 317554
Name: Clonazepam
CAS#: 1622-61-3
Chemical Formula: C15H10ClN3O3
Exact Mass: 315.04107
Molecular Weight: 315.71
Elemental Analysis: C, 57.06; H, 3.19; Cl, 11.23; N, 13.31; O, 15.20

Price and Availability

This product is not in stock, which may be available by custom synthesis. For cost-effective reason, minimum order is 1g (price is usually high, lead time is 2~3 months, depending on the technical challenge). Quote less than 1g will not be provided. To request quote, please email to sales or click below button.
Note: Price will be listed if it is available in the future.

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Synonym: Rivotril; Antelepsin; Iktorivil; Chlonazepam; Cloazepam; Ro 5-4023; Ro 54023; Klonopin; Clonotril

IUPAC/Chemical Name: 5-(2-chlorophenyl)-7-nitro-1,3-dihydro-1,4-benzodiazepin-2-one


InChi Code: InChI=1S/C15H10ClN3O3/c16-12-4-2-1-3-10(12)15-11-7-9(19(21)22)5-6-13(11)18-14(20)8-17-15/h1-7H,8H2,(H,18,20)

SMILES Code: C1C(=O)NC2=C(C=C(C=C2)[N+](=O)[O-])C(=N1)C3=CC=CC=C3Cl

Appearance: Solid powder

Purity: >99% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 315.71 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1: Navarro V, Dagron C, Elie C, Lamhaut L, Demeret S, Urien S, An K, Bolgert F, Tréluyer JM, Baulac M, Carli P; SAMUKeppra investigators. Prehospital treatment with levetiracetam plus clonazepam or placebo plus clonazepam in status epilepticus (SAMUKeppra): a randomised, double-blind, phase 3 trial. Lancet Neurol. 2015 Nov 25. pii: S1474-4422(15)00296-3. doi: 10.1016/S1474-4422(15)00296-3. [Epub ahead of print] PubMed PMID: 26627366.

2: Honeychurch KC, Brooks J, Hart JP. Development of a voltammetric assay, using screen-printed electrodes, for clonazepam and its application to beverage and serum samples. Talanta. 2016 Jan 15;147:510-5. doi: 10.1016/j.talanta.2015.10.032. Epub 2015 Oct 21. PubMed PMID: 26592640.

3: Henderson C, Karnack C. Neonatal abstinence syndrome: use of clonazepam? J Perinatol. 2015 Oct;35(10):891. doi: 10.1038/jp.2015.49. PubMed PMID: 26412405.

4: Ibrahim F, El-Enany N, Shalan S, Elsharawy R. Validated spectrofluorimetric method for the determination of clonazepam in pharmaceutical preparations. Luminescence. 2015 Sep 2. doi: 10.1002/bio.3011. [Epub ahead of print] PubMed PMID: 26335592.

5: Alvarez V, Lee JW, Drislane FW, Westover MB, Novy J, Dworetzky BA, Rossetti AO. Practice variability and efficacy of clonazepam, lorazepam, and midazolam in status epilepticus: A multicenter comparison. Epilepsia. 2015 Aug;56(8):1275-85. doi: 10.1111/epi.13056. Epub 2015 Jul 3. PubMed PMID: 26140660.

6: Mowla A, Ahmadzadeh L, Razeghian Jahromi L, Dastgheib SA. Comparing Gabapentin with Clonazepam for Residual Sleeping Problems following Antidepressant Therapy in Patients with Major Depressive Disorder: A Randomized Clinical Trial. Clin Drug Investig. 2015 Aug;35(8):513-7. doi: 10.1007/s40261-015-0304-8. PubMed PMID: 26123629.

7: Shangguan Y, Liao H, Wang X. Clonazepam in the treatment of status epilepticus. Expert Rev Neurother. 2015;15(7):733-40. doi: 10.1586/14737175.2015.1056781. PubMed PMID: 26109227.

8: Jurisic Kvesic A, Zavoreo I, Basic Kes V, Vucicevic Boras V, Ciliga D, Gabric D, Vrdoljak DV. The effectiveness of acupuncture versus clonazepam in patients with burning mouth syndrome. Acupunct Med. 2015 Aug;33(4):289-92. doi: 10.1136/acupmed-2015-010759. Epub 2015 May 18. PubMed PMID: 25987645.

9: Fu K, Zhou D, Tang X, Chen L. Clonazepam needs to be taken care for refractory epilepsy: a rare case and review. J Neuropsychiatry Clin Neurosci. 2015;27(2):e143-5. doi: 10.1176/appi.neuropsych.13120361. PubMed PMID: 25923860.

10: Høiseth G, Middelkoop G, Mørland J, Gjerde H. Has Previous Abuse of Flunitrazepam Been Replaced by Clonazepam? Eur Addict Res. 2015;21(4):217-21. doi: 10.1159/000377628. Epub 2015 Apr 21. PubMed PMID: 25895512.