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129938-20-1 Usage


Dapoxetine hydrochloride, also known as Priligy, is a short-acting selective serotonin reuptake inhibitor (SSRI) with a unique structure similar to fluoxetine. It is the first drug approved for the on-demand treatment of premature ejaculation (PE) in men, offering a rapid absorption and peak plasma concentration within 1.4 to 2 hours after oral administration. As a BCSI class II compound, its solubility varies with different crystal forms, affecting clinical efficacy.


Used in Pharmaceutical Industry:
Dapoxetine hydrochloride is used as a therapeutic agent for the treatment of premature ejaculation (PE) in men. It is particularly effective due to its rapid absorption and short-acting nature, providing on-demand relief for the most common male sexual dysfunction, which is estimated to affect up to 30% of men.


Lilly (US)

Biochem/physiol Actions

Potent Selective serotonin reuptake inhibitor (SSRI); used in treatment of premature ejaculation


Dapoxetine can be synthesized in four chemical steps starting from R-1phenyl- 1,3-propanediol via selective tosylation of the primary hydroxy group with p-toluenesulfonyl chloride, triethylamine and 4-(dimethylamino) pyridine (DMAP), and subsequent condensation with 1naphthol by means of sodium- or lithium hydroxide to yield R-3-(1naphthyloxy)- 1-phenylpropanol as the key intermediate. Conversion of the alcohol group to the corresponding mesylate with methanesulfonyl chloride, triethylamine, and DMAP, followed by treatment with dimethylamine affords dapoxetine, which is then acidified to its hydrochloride salt.

Mode of action

The mechanism of action of dapoxetine in premature ejaculation is presumed to be linked to the inhibition of neuronal reuptake of serotonin and the subsequent potentiation of the neurotransmitter's action at pre- and post-synaptic receptors. Dapoxetine is a centrally-acting SSRI that modulates serotonin levels in relevant areas such as the lateral paragigantocellular nucleus through inhibition of the serotonin transporter (SERT). This compound also decreases peak amplitude and accelerates the decay rate of current inactivation in a variety of voltage-gated K+ channels.

Check Digit Verification of cas no

The CAS Registry Mumber 129938-20-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,9,3 and 8 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 129938-20:
161 % 10 = 1
So 129938-20-1 is a valid CAS Registry Number.

129938-20-1 Well-known Company Product Price

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  • TCI America

  • (D4761)  Dapoxetine Hydrochloride  >98.0%(HPLC)

  • 129938-20-1

  • 1g

  • 690.00CNY

  • Detail
  • TCI America

  • (D4761)  Dapoxetine Hydrochloride  >98.0%(HPLC)

  • 129938-20-1

  • 5g

  • 2,490.00CNY

  • Detail
  • Sigma

  • (D7071)  Dapoxetine hydrochloride  ≥98% (HPLC)

  • 129938-20-1

  • D7071-10MG

  • 981.63CNY

  • Detail
  • Sigma

  • (D7071)  Dapoxetine hydrochloride  ≥98% (HPLC)

  • 129938-20-1

  • D7071-50MG

  • 3,946.41CNY

  • Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017


1.1 GHS Product identifier

Product name Dapoxetine Hydrochloride

1.2 Other means of identification

Product number -
Other names Dapoxetine HCl

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:129938-20-1 SDS

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