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

MedKoo CAT#: 300320

CAS#: 162401-32-3

Description: Roflumilast is a drug which acts as a selective, long-acting inhibitor of the enzyme PDE-4. It has anti-inflammatory effects and is under development as an orally administered drug for the treatment of inflammatory conditions of the lungs such as asthma, and chronic obstructive pulmonary disease (COPD). In June 2010, Daxas was approved in the EU for severe COPD associated with chronic bronchitis.[9] In March 2011, Daliresp gained FDA approval in the US for reducing COPD exacerbations.

Chemical Structure

CAS# 162401-32-3

Theoretical Analysis

MedKoo Cat#: 300320
Name: Roflumilast
CAS#: 162401-32-3
Chemical Formula: C17H14Cl2F2N2O3
Exact Mass: 402.03495
Molecular Weight: 403.21
Elemental Analysis: C, 50.64; H, 3.50; Cl, 17.58; F, 9.42; N, 6.95; O, 11.90

Price and Availability

Size Price Availability Quantity
250.0mg USD 250.0 2 Weeks
500.0mg USD 450.0 2 Weeks
1.0g USD 750.0 2 Weeks
2.0g USD 1350.0 2 Weeks
5.0g USD 2450.0 2 Weeks
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Synonym: BY217; BY-217; BY 217; B 9302-107; B9302-107; B-9302-107; BYK 20869; BYK-20869; BYK20869; Daxas; Daliresp

IUPAC/Chemical Name: 3-(cyclopropylmethoxy)-N-(3,5-dichloropyridin-4-yl)-4-(difluoromethoxy)benzamide


InChi Code: InChI=1S/C17H14Cl2F2N2O3/c18-11-6-22-7-12(19)15(11)23-16(24)10-3-4-13(26-17(20)21)14(5-10)25-8-9-1-2-9/h3-7,9,17H,1-2,8H2,(H,22,23,24)


Appearance: solid powder

Purity: >98% (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.

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 403.21 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: Oba Y, Lone NA. Efficacy and safety of roflumilast in patients with chronic obstructive pulmonary disease: a systematic review and meta-analysis. Ther Adv Respir Dis. 2013 Feb;7(1):13-24. doi: 10.1177/1753465812466167. Epub 2012 Nov 29. Review. PubMed PMID: 23197074.

2: Taegtmeyer AB, Leuppi JD, Kullak-Ublick GA. Roflumilast--a phosphodiesterase-4 inhibitor licensed for add-on therapy in severe COPD. Swiss Med Wkly. 2012 Jul 25;142:w13628. doi: 10.4414/smw.2012.13628. Review. PubMed PMID: 22833385.

3: Reid DJ, Pham NT. Roflumilast: a novel treatment for chronic obstructive pulmonary disease. Ann Pharmacother. 2012 Apr;46(4):521-9. doi: 10.1345/aph.1Q646. Epub 2012 Mar 20. Review. PubMed PMID: 22433610.

4: Pinner NA, Hamilton LA, Hughes A. Roflumilast: a phosphodiesterase-4 inhibitor for the treatment of severe chronic obstructive pulmonary disease. Clin Ther. 2012 Jan;34(1):56-66. doi: 10.1016/j.clinthera.2011.12.008. Review. PubMed PMID: 22284994.

5: Lahu G, Nassr N, Hünnemeyer A. Pharmacokinetic evaluation of roflumilast. Expert Opin Drug Metab Toxicol. 2011 Dec;7(12):1577-91. doi: 10.1517/17425255.2011.632409. Epub 2011 Nov 8. Review. PubMed PMID: 22059647.

6: Izquierdo Alonso JL. [Phosphodiesterase-4 inhibitors: roflumilast]. Rev Clin Esp. 2011 Mar;211 Suppl 2:22-30. doi: 10.1016/S0014-2565(11)70008-X. Review. Spanish. PubMed PMID: 21596170.

7: Antoniu SA. New therapeutic options in the management of COPD - focus on roflumilast. Int J Chron Obstruct Pulmon Dis. 2011;6:147-55. doi: 10.2147/COPD.S7336. Epub 2011 Feb 17. Review. PubMed PMID: 21468165; PubMed Central PMCID: PMC3064419.

8: Roflumilast for severe COPD? Drug Ther Bull. 2011 Apr;49(4):45-8; quiz iii-iv. doi: 10.1136/dtb.2011.02.0025. Review. PubMed PMID: 21467576.

9: Izquierdo Alonso JL. [Clinical profile of roflumilast]. Arch Bronconeumol. 2010 Dec;46 Suppl 10:25-32. doi: 10.1016/S0300-2896(10)70053-3. Review. Spanish. PubMed PMID: 21316553.

10: Cortijo Gimeno J, Morcillo Sánchez E. [Pharmacological profile of roflumilast]. Arch Bronconeumol. 2010 Dec;46 Suppl 10:19-24. doi: 10.1016/S0300-2896(10)70052-1. Review. Spanish. PubMed PMID: 21316552.