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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 5284486Generated: November 2, 2026

19-Norpregn-4-en-20-yn-17-ol

Lynestrenol EP impurity B · 19-Norpregn-4-en-20-yn-17-ol · 19-Norpregn-4-en-20-yn-17-ol (9CI)

https://huagongshe.com/en/chemical/5284486

19-Norpregn-4-en-20-yn-17-ol molecular structure

Identifiers & Physical Properties

CAS No.58311-09-4
Molecular formulaC20H28O
Average molar mass284.4 g/mol
Monoisotopic mass284.21401551 g/mol
SMILESC#C[C@@]1(O)CC[C@H]2[C@@H]3CCC4=CCCC[C@@H]4[C@H]3CC[C@@]21C
InChIKeyYNVGQYHLRCDXFQ-JBKQDOAHSA-N
PubChem CID5284486
ChEMBLCHEMBL3182598
EC No.856-330-8
DTXSIDDTXSID30858975

Chemical & Physical Properties

XLogP4.5
Topological polar surface area20.2
Hydrogen bond donors1
Hydrogen bond acceptors1
Rotatable bonds1
Heavy atoms21
Formal charge0
Complexity523
Boiling point399.6±42.0 °C(Predicted)
Density1.08±0.1 g/cm3(Predicted)
pKa (acidity coefficient)13.12±0.40(Predicted)
FDA UNIIIN20I6UNU6
GHS pictogramGHS08,GHS07
Signal wordDanger
GHS hazard statementsH351-H302-H341-H360Df
GHS precautionary statementsP201-P202-P281-P308+P313-P405-P501-P201-P202-P281-P308+P313-P405-P501-P264-P270-P301+P312-P330-P501

Safety & Regulations

GHS classificationDangerH302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]P203, P264, P270, P280, P301+P317, P318, P330, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 18 reports by companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard Classes and CategoriesAcute Tox. 4 (100%)
Signal wordDanger
GHS pictogramGHS08,GHS07
GHS hazard statementsH351-H302-H341-H360Df
GHS precautionary statementsP201-P202-P281-P308+P313-P405-P501-P201-P202-P281-P308+P313-P405-P501-P264-P270-P301+P312-P330-P501