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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 136752Generated: October 27, 2026

1-Ethynyl-4-nitrobenzene

1-ETHYNYL-4-NITROBENZENE · 4-Nitroethynylbenzene · NSC 71089 · -4-nitrobenzene · NITROPHENYLACETYLENE · (4-Nitrophenyl)ethyne · p-Nitroethynylbenzene · p-Ethynylnitrobenzene

https://huagongshe.com/en/chemical/136752

1-Ethynyl-4-nitrobenzene molecular structure

Identifiers & Physical Properties

CAS No.937-31-5
Molecular formulaC8H5NO2
Average molar mass147.13 g/mol
Monoisotopic mass147.0320284 g/mol
SMILESC#Cc1ccc([N+](=O)[O-])cc1
InChIKeyGAZZTEJDUGESGQ-UHFFFAOYSA-N
PubChem CID136752
EC No.804-971-9
DTXSIDDTXSID90239544

Chemical & Physical Properties

XLogP2.3
Topological polar surface area45.8
Hydrogen bond donors0
Hydrogen bond acceptors2
Rotatable bonds1
Heavy atoms11
Formal charge0
Complexity190
SpringerMaterials PropertiesDensity
Melting point148-150 °C(lit.)
Boiling point246.6±23.0 °C(Predicted)
Density1.22±0.1 g/cm3(Predicted)
Storage conditionsKeep in dark place,Sealed in dry,Room Temperature
SolubilityEthanol, Ether
Physical stateSolid
ColorLight Yellow
λmax286nm(CH2Cl2)(lit.)
InChIInChI=1S/C8H5NO2/c1-2-7-3-5-8(6-4-7)9(10)11/h1,3-6H
InChIKeyGAZZTEJDUGESGQ-UHFFFAOYSA-N
SMILESC1(C#C)=CC=C([N+]([O-])=O)C=C1
CAS DataBase Reference937-31-5(CAS DataBase Reference)
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302-H315-H319-H335
GHS precautionary statementsP233-P260-P261-P264-P270-P271-P280-P301+P312-P302+P352-P304-P304+P340-P305+P351+P338-P312-P321-P330-P332+P313-P337+P313-P340-P362-P403-P403+P233-P405-P501
Personal protective equipment (PPE)Eyeshields, Gloves, type N95 (US)
Safety statements (S)24/25
Water hazard class (WGK)3
Customs code29049090
Storage class11 - Combustible Solids

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 33.3% (1 of 3) of reports.WarningH315 (66.7%): Causes skin irritation [Warning Skin corrosion/irritation]P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 3 reports by companies from 3 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard Classes and CategoriesSkin Irrit. 2 (66.7%)
Personal protective equipment (PPE)Eyeshields, Gloves, type N95 (US)
Water hazard class (WGK)3
Customs code29049090
Signal wordWarning
GHS pictogramGHS07
Safety statements (S)24/25
Storage class11 - Combustible Solids
GHS hazard statementsH302-H315-H319-H335
GHS precautionary statementsP233-P260-P261-P264-P270-P271-P280-P301+P312-P302+P352-P304-P304+P340-P305+P351+P338-P312-P321-P330-P332+P313-P337+P313-P340-P362-P403-P403+P233-P405-P501

Applications & Uses

Uses

4-Nitrophenylacetylene (cas# 937-31-5) is a compound useful in organic synthesis.