4-Ethynylaniline(P-APAC) - ≥98%(HPLC) , CAS No.14235-81-5

CAS: 14235-81-5 Cat. No.: E156336 Molecular Weight: 117.15 Beilstein Registry Number: 2205180 EC Number: 628-948-6
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GRADE & PURITY ≥98%(HPLC)
Synonyms
P-APAC | p-aminophenylacetylene | p-aminophenyl-acetylene | AKOS005257063 | 1T-1123 | MFCD00168824 | Benzenamine, 4-ethynyl- | SY035744 | F13709 | 4-Ethynyl-phenylamine | SCHEMBL106193 | E0505 | (4-ethynylphenyl)amine | (4-ethynyl-phenyl)-amine | 1-Amino-
Storage
Store at 2-8°C,Protected from light,Argon charged
Shipped In
Wet ice
Size
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Why this grade

≥98%(HPLC) for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Store at 2-8°C,Protected from light,Argon charged Ships Wet ice Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 13 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

4-Ethynylaniline, also known as p-ethynylaniline, is a terminal alkyne. Its synthesis using 2-methyl-3-butyn-2-ol (MEBYNOL) has been reported. The transition metal catalyzed polymerization of 4-ethynylaniline to afford poly(4-ethynylaniline) has been reported.The impact of the surface functionalization with 4-ethynylaniline on the thermal behavior of multi-walled carbon nanotubes (MWNTs) and graphene has been investigated.

4-Ethynylaniline may be used in the synthesis of N-methyliminodiethyl 4-(4-ethynylphenyliminomethyl)benzeneboronate. It can also be used to prepare an acetylene ligand, HC2-NDI (NDI= 1,4,5,8-naphthalenediimide).

Used as an alkyne component in a synthesis of indoles from nitroarenes in the presence of a palladium-phenantroline catalyst.

Specifications

Synonyms
P-APAC | p-aminophenylacetylene | p-aminophenyl-acetylene | AKOS005257063 | 1T-1123 | MFCD00168824 | Benzenamine, 4-ethynyl- | SY035744 | F13709 | 4-Ethynyl-phenylamine | SCHEMBL106193 | E0505 | (4-ethynylphenyl)amine | (4-ethynyl-phenyl)-amine | 1-Amino-
Specifications & Purity
≥98%(HPLC)
Storage
Store at 2-8°C, Protected from light, Argon charged
Shipped In
Wet ice
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥98%(HPLC)
Names and Identifiers
Pubchem Sid504762710
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504762710
Canonical SmilesC#CC1=CC=C(C=C1)N
IUPAC Name4-ethynylaniline
InChIKeyJXYITCJMBRETQX-UHFFFAOYSA-N
INCHI1S/C8H7N/c1-2-7-3-5-8(9)6-4-7/h1,3-6H,9H2
Isomeric SMILES C#CC1=CC=C(C=C1)N
WGK Germany 3
Molecular Weight 117.15
Beilstein 2205180
Reaxy-Rn 2205181
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=2205181&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassBenzenoids
ClassBenzene and substituted derivatives
SubclassAniline and substituted anilines
Intermediate Tree Nodes Not available
Direct ParentAniline and substituted anilines
Alternative Parents Acetylides  Primary amines  Organopnictogen compounds  Hydrocarbon derivatives  
Molecular FrameworkAromatic homomonocyclic compounds
Substituents Aniline or substituted anilines - Acetylide - Organic nitrogen compound - Organopnictogen compound - Hydrocarbon derivative - Primary amine - Organonitrogen compound - Amine - Aromatic homomonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as aniline and substituted anilines. These are organic compounds containing an aminobenzene moiety.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

18 results found

Lot NumberCertificate TypeDateItem
E2223093Certificate of AnalysisMar 11, 2026 E156336
E2223089Certificate of AnalysisMar 11, 2026 E156336
E2223085Certificate of AnalysisMar 11, 2026 E156336
B2625554Certificate of AnalysisJan 30, 2026 E156336
B2625579Certificate of AnalysisJan 30, 2026 E156336
B2625578Certificate of AnalysisJan 30, 2026 E156336
B2625555Certificate of AnalysisJan 30, 2026 E156336
H2508363Certificate of AnalysisJul 24, 2025 E156336
H2508364Certificate of AnalysisJul 24, 2025 E156336
H2508365Certificate of AnalysisJul 24, 2025 E156336
C2511237Certificate of AnalysisJun 12, 2024 E156336
F1826040Certificate of AnalysisApr 27, 2022 E156336
C2512276Certificate of AnalysisMar 10, 2022 E156336
D2507097Certificate of AnalysisMar 10, 2022 E156336
E2223084Certificate of AnalysisMar 10, 2022 E156336
A2426052Certificate of AnalysisMar 10, 2022 E156336
E2512058Certificate of AnalysisMar 10, 2022 E156336
J2429172Certificate of AnalysisMar 10, 2022 E156336

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Chemical and Physical Properties
SensitivityMoisture & air & light sensitive
Melt Point(°C)98-102 °C
Molecular Weight117.150 g/mol
XLogP31.300
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count1
Rotatable Bond Count1
Exact Mass117.058 Da
Monoisotopic Mass117.058 Da
Topological Polar Surface Area26.000 Ų
Heavy Atom Count9
Formal Charge0
Complexity123.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Citations of This Product
References
1. Jieyu Hu, Xingxing Yu, Xiumei Zhuang, Yan Sun, Junjie Wang, Haiting Ren, Shenghao Zhang, Yueshou Zhang, Hongxing Qiu, Yongjun Hu.  (2022)  Construction of an enzyme-free biosensor utilizing CuO nanoparticles enriched in DNA polymer to catalyze a click chemistry reaction for SERS detection of the p53 gene.  ANALYTICA CHIMICA ACTA,      [PMID:35934418] [10.1016/j.aca.2022.339958]
2. Qingxia Zhu, Xiaowen Lu, Siqi Ji, Honghong Li, Jun Wang, Zhijun Li.  (2021)  Fully exposed cobalt nanoclusters anchored on nitrogen-doped carbon synthesized by a host-guest strategy for semi-hydrogenation of phenylacetylene.  JOURNAL OF CATALYSIS,      [PMID:] [10.1016/j.jcat.2021.11.021]
3. Li Yongguang, Fei Yuexuan, Sun Hongcheng, Yu Shuangjiang, Liu Junqiu.  (2021)  Regulation of the Switchable Luminescence of Tridentate Platinum(II) Complexes by Photoisomerization.  Frontiers in Chemistry,      [PMID:33614596] [10.3389/fchem.2020.622256]
4. Zhijun Li, Qinghui Ren, Xuexia Wang, Wenxing Chen, Leipeng Leng, Mingyang Zhang, J. Hugh Horton, Bo Liu, Qian Xu, Wei Wu, Jun Wang.  (2021)  Highly Active and Stable Palladium Single-Atom Catalyst Achieved by a Thermal Atomization Strategy on an SBA-15 Molecular Sieve for Semi-Hydrogenation Reactions.  ACS Applied Materials & Interfaces,      [PMID:33412851] [10.1021/acsami.0c17570]
5. Huifa Meng, Kaijin Chen, Chuying Li, Yanwei He, Zihao Huang, Haitao Huang, Zhenguo Chi, Siwei Liu, Yi Zhang.  (2025)  Low-CTE, Strong-Adhesion, and High-Resolution Photosensitive Polyimide Materials for Advanced Packaging Applications: Structure and Properties.  ACS Applied Polymer Materials,      [PMID:] [10.1021/acsapm.5c00001]
6. Cheng Yuan, Qiqi Wu, Ke-Xin Xu, Xing-Shi Liu, Hao Lou, Yi-Tong Xu, Zheng Li, Yuanyuan Meng, Tan Li, Rui Ban, Guangxu Chen, Wei-Wei Zhao.  (2024)  Metal-organic polymer enables efficient organic photoelectrochemical transistor biosensing.  BIOSENSORS & BIOELECTRONICS,      [PMID:38688230] [10.1016/j.bios.2024.116346]
7. He Meng, Li Rui, Cheng Chuanqi, Liu Cuibo, Zhang Bin.  (2024)  Microenvironment regulation breaks the Faradaic efficiency-current density trade-off for electrocatalytic deuteration using D2O.  Nature Communications,  15  (1): (1-10).  [PMID:38898044] [10.1038/s41467-024-49544-y]
8. Min Zhong, Weichen Sheng, Jianfeng Chen, Han Zhang, Hongping Li, Kan Zhang.  (2025)  Synthesis and isomeric effect of ethynyl-containing sesamol-based monobenzoxazine resins.  REACTIVE & FUNCTIONAL POLYMERS,      [PMID:] [10.1016/j.reactfunctpolym.2025.106245]
9. Wenhui Yan, Shijun Li, Jieyao Wang, Xingyu Ma, Mingxuan Zhang, Lei Li.  (2025)  Domino Polymerization toward Microporous Polythioureas for Selective Gold Recovery from Electronic Waste.  ACS Applied Polymer Materials,      [PMID:] [10.1021/acsapm.5c02365]
10. Wei Sun, Qing Xu, Qili Liu, Tianliang Wang, Zhaixin Liu.  (2023)  Post-synthetic modification of a magnetic covalent organic framework with alkyne linkages for efficient magnetic solid-phase extraction and determination of trace basic orange II in food samples.  JOURNAL OF CHROMATOGRAPHY A,      [PMID:36640681] [10.1016/j.chroma.2023.463777]
11. Yujie Wang, Jiaying Liu, Yongbo Cui, Meng Liu, Wenxia Chen, Wei Wei, Haifeng Lu, Dongyun Han.  (2025)  Amorphous CoS polyhedron endow efficient electrocatalytic semi-hydrogenation of acetylene.  Materials Today Communications,      [PMID:] [10.1016/j.mtcomm.2025.112431]
12. Yuan Ren, Ruiyun Guo, Yanan Li, Zixin Ge, Yaohui Zhao, Jiapeng Huang, Qian Wang, Junhao Lu, Mingshang Jin.  (2025)  Carbon-Doped Lattice Interstitial Sites Enable Water-Driven Electrocatalytic Alkyne Semihydrogenation by Suppressing Subsurface Hydrogen.  ACS Catalysis,      [PMID:] [10.1021/acscatal.5c05096]
13. Hanwen Duan, Chaoyi Zhu, Ying Yuan, Jinxi Li, Haixiang Li, Yingjun Li.  (2025)  Effect of functionalization degree of graphene oxide on Pd dispersion of Pd/PEAN-functionalized GO.  FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES,      [PMID:] [10.1080/1536383X.2025.2583367]
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