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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 5284472Generated: November 2, 2026

Triprolidine hydrochloride monohydrate

TRIPROLIDINE HCL MONOHYDRATE · rate,stereoisomer · TRIPROLIDINE HCL USP · trans-TriprolidineHCl · Tripolidine Hydrochloride · Triprolidine hydrochloride · Triprolidine Hydrochlorise · TRIPROLIDINEHYDROCHLORIDE,USP

https://huagongshe.com/en/chemical/5284472

Triprolidine hydrochloride monohydrate molecular structure

Identifiers & Physical Properties

CAS No.6138-79-0
Molecular formulaC19H22N2.ClH.H2O
Average molar mass332.9 g/mol
Monoisotopic mass332.1655411 g/mol
SMILESCc1ccc(/C(=C\CN2CCCC2)c2ccccn2)cc1.Cl.O
InChIKeyCUZMOIXUFHOLLN-UMVVUDSKSA-N
PubChem CID5284472
ChEMBLCHEMBL3188034
ChEBICHEBI:32265
EC No.627-740-2
DTXSIDDTXSID0021410

Chemical & Physical Properties

Topological polar surface area17.1
Hydrogen bond donors2
Hydrogen bond acceptors3
Rotatable bonds4
Heavy atoms23
Formal charge0
Complexity335
Solubilitygreater than or equal to 100 mg/mL at 68 °F (NTP, 1992)alcohol: soluble1 in 1.5 of solvent>=10 g/100 mL at 20 ºC
Melting point239 to 248 °F (NTP, 1992)115-120°C
Physical DescriptionTriprolidine hydrochloride monohydrate is an odorless white crystalline powder. Bitter taste. (NTP, 1992)
Storage conditions2-8°C
Physical stateSolid
ColorWhite to Off-White
Merck13,9817
StabilityStable, but discolours in light. Incompatible with strong oxidizing agents.
InChIInChI=1S/C19H22N2.ClH/c1-16-7-9-17(10-8-16)18(19-6-2-3-12-20-19)11-15-21-13-4-5-14-21/h2-3,6-12H,4-5,13-15H2,1H31H/b18-11+
InChIKeyWYUYEJNGHIOFOC-NWBUNABESA-N
SMILESC(=C/CN1CCCC1)(\C1=NC=CC=C1)/C1C=CC(C)=CC=1.Cl
LogP (partition coefficient)4.223 (est)
CAS DataBase Reference6138-79-0(CAS DataBase Reference)
FDA 21 CFR341.12
FDA UNIIYAN7R5L890
EPA Substance Registry SystemPyridine, 2-[1-(4-methylphenyl)-3-(1-pyrrolidinyl)-1-propenyl]-, monohydrochloride, monohydrate, (E)- (6138-79-0)
UNSPSC Code41116107
NACRESNA.77
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302-H315-H319-H335
GHS precautionary statementsP261-P264-P270-P301+P312-P302+P352-P305+P351+P338
Target organsRespiratory system
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Hazard symbolsXn
Risk statements (R)22-36/37/38
Safety statements (S)26-36
Water hazard class (WGK)3
RTECS numberUT7658000
Customs code2933399090
Storage class11 - Combustible Solids
Hazard classAcute Tox. 4 OralEye Irrit. 2Skin Irrit. 2STOT SE 3

Safety & Regulations

GHS classificationWarningH302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 96 reports by companies from 7 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationPyridine, 2-(1E)-1-(4-methylphenyl)-3-(1-pyrrolidinyl)-1-propenyl-, monohydrochloride, monohydrate: Does not have an individual approval but may be used under an appropriate group standard
Other safety informationIMAP assessments - Pyridine, 2-[1-(4-methylphenyl)-3-(1-pyrrolidinyl)-1-propenyl]-, monohydrochloride, monohydrate, (E)-: Environment tier I assessment
Fire hazardsFlash point data for this chemical are not availablehowever, it is probably combustible. (NTP, 1992)
Health hazardsSYMPTOMS: Symptoms of exposure to this compound may include depression to stimulation of the central nervous system, dry mouth, fixed dilated pupils, flushing, hallucinations, convulsions, urinary retention, cardiac arrhythmias and coma. Other symptoms may include excitability, drowsiness, nervousness, dizziness, high fever and sleeplessness. It can also cause sedation. It may also cause local anesthesia, dryness of the throat and nose and abdominal pain with vomiting or diarrhea. (NTP, 1992)
Reactive groupAmines, Phosphines, and Pyridines
Reactivity ProfileTRIPROLIDINE HYDROCHLORIDE MONOHYDRATE discolors on exposure to light. It is an acidic salt and can neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions.
Air and Water ReactionsWater soluble.
Hazard Classes and CategoriesAcute Tox. 4 (100%)

Applications & Uses

Uses

anticholinergic (opthalmic)

Uses

trans-Triprolidine Hydrochloride is a potent H1 receptor antagonist. Anti-histamines.

Uses

TRIPROLIDINE HYDROCHLORIDE is used as bulk pharmaceutical (antihistaminic). Product Data Sheet

General Description

Triprolidine hydrochloride,(E)-2-[3-(1-pyrrolidinyl)-1-p-tolylpropenyl]pyridine monohydrochloridemonohydrate (Actidil), is a white crystalline powder with a slight, but unpleasant, odor. It is soluble inwater and in alcohol, and its solutions are alkaline to litmus.The antihistaminic activity is confined mainly to the geometricisomer in which the pyrrolidinomethyl group is transto the 2-pyridyl group. Pharmacological studies confirm thehigh activity of triprolidine and the superiority of (E) overcorresponding (Z) isomers as H1-antihistamines. At guineapig ileum sites, the affinity of triprolidine for H-receptorswas more than 1,000 times the affinity of its (Z) diasteromer.The relative potency of triprolidine is of the same orderas that of dexchlorpheniramine. The peak effect occursabout 3.5 hours after oral administration, and the duration ofeffect is about 12 hours.

General Description

Odorless white crystalline powder. Bitter taste.

Fire fightingFires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992)
First aidEYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. If symptoms (such as redness or irritation) develop, immediately transport the victim to a hospital.
Nonfire spill responseSMALL SPILLS AND LEAKAGE: If you spill this chemical, you should dampen the solid spill material with water, then transfer the dampened material to a suitable container. Use absorbent paper dampened with water to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Wash all contaminated surfaces with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Personal Protective Equipment (PPE)RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter. (NTP, 1992)
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK)3
RTECS numberUT7658000
Customs code2933399090
Risk statements (R)22-36/37/38
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXn
Safety statements (S)26-36
Storage class11 - Combustible Solids
Target organsRespiratory system
GHS hazard statementsH302-H315-H319-H335
Hazard classAcute Tox. 4 OralEye Irrit. 2Skin Irrit. 2STOT SE 3
GHS precautionary statementsP261-P264-P270-P301+P312-P302+P352-P305+P351+P338