Basic Description

Synonyms	3-Methyl-butin-(1)-ol-(3) [German] \| 3-methyl-3-hydroxy-1-butyne \| Q209427 \| 2-methylbutan-3-yn-2-ol \| 3-methyl-1-butin-3-ol \| EC 204-070-5 \| EN300-60208 \| InChI=1/C5H8O/c1-4-5(2,3)6/h1,6H,2-3H \| 2-Methyl-3-butyn-2-ol, purum, >=99.0% (GC)
Specifications & Purity	≥98%
Storage Temp	Room temperature
Shipped In	Normal
Product Description	2-Methyl-3-butyn-2-ol (MBY) is used as a precursor in the Mannich reaction and can undergo selective semihydrogenation to produce fine chemicals.

Taxonomic Classification

Taxonomy Tree

Kingdom Organic compounds
- Superclass Organic oxygen compounds
  - Class Organooxygen compounds
    - Subclass Carbonyl compounds
      - Level5 Alpha,beta-unsaturated carbonyl compounds
        Level6 Alpha,beta-unsaturated ketones
        Level7 Ynones

Kingdom	Organic compounds
Superclass	Organic oxygen compounds
Class	Organooxygen compounds
Subclass	Carbonyl compounds
Intermediate Tree Nodes	Alpha,beta-unsaturated carbonyl compounds - Alpha,beta-unsaturated ketones
Direct Parent	Ynones
Alternative Parents	Tertiary alcohols Acetylides Hydrocarbon derivatives
Molecular Framework	Aliphatic acyclic compounds
Substituents	Ynone - Tertiary alcohol - Acetylide - Hydrocarbon derivative - Alcohol - Aliphatic acyclic compound
Description	This compound belongs to the class of organic compounds known as ynones. These are organic compounds containing the ynone functional group, an alpha,beta unsaturated ketone group with the general structure RC#C-C(=O)R' (R' not H).
External Descriptors	Not available
1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61. DOI: 10.1186/s13321-016-0174-y

Names and Identifiers

Pubchem Sid	488180739
Pubchem Sid Url	https://pubchem.ncbi.nlm.nih.gov/substance/488180739
IUPAC Name	2-methylbut-3-yn-2-ol
INCHI	InChI=1S/C5H8O/c1-4-5(2,3)6/h1,6H,2-3H3
InChIKey	CEBKHWWANWSNTI-UHFFFAOYSA-N
Smiles	CC(C)(C#C)O
Isomeric SMILES	CC(C)(C#C)O
WGK Germany	1
RTECS	ES0810000
UN Number	1987
Packing Group	I
Molecular Weight	84.12
Beilstein	635746
Reaxy-Rn	635746
Reaxys-RN_link_address	https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=635746&ln=

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.

40 results found

Lot Number	Certificate Type	Date	Item
I2311017	Certificate of Analysis	Jun 10, 2025	M107736
F2509138	Certificate of Analysis	May 30, 2025	M107736
F2509549	Certificate of Analysis	May 30, 2025	M107736
F2509139	Certificate of Analysis	May 30, 2025	M107736
C2302136	Certificate of Analysis	Apr 18, 2025	M107736
D2318299	Certificate of Analysis	Jan 06, 2025	M107736
D2318293	Certificate of Analysis	Jan 06, 2025	M107736
C2302133	Certificate of Analysis	Dec 10, 2024	M107736
L2411747	Certificate of Analysis	Nov 30, 2024	M107736
L2411776	Certificate of Analysis	Nov 30, 2024	M107736
L2411748	Certificate of Analysis	Nov 30, 2024	M107736
L2411749	Certificate of Analysis	Nov 30, 2024	M107736
L2411750	Certificate of Analysis	Nov 30, 2024	M107736
F2411287	Certificate of Analysis	May 31, 2024	M107736
J2415130	Certificate of Analysis	May 31, 2024	M107736
F2411295	Certificate of Analysis	May 31, 2024	M107736
F2411283	Certificate of Analysis	May 31, 2024	M107736
F2411492	Certificate of Analysis	May 31, 2024	M107736
D2402344	Certificate of Analysis	Mar 13, 2024	M107736
D2402345	Certificate of Analysis	Mar 13, 2024	M107736
D2402346	Certificate of Analysis	Mar 13, 2024	M107736
C2223507	Certificate of Analysis	Dec 15, 2023	M107736
C2223498	Certificate of Analysis	Dec 15, 2023	M107736
C2223509	Certificate of Analysis	Dec 15, 2023	M107736
A1825107	Certificate of Analysis	Sep 28, 2023	M107736
K2129335	Certificate of Analysis	Sep 15, 2023	M107736
C2003060	Certificate of Analysis	Sep 13, 2023	M107736
C2302137	Certificate of Analysis	Feb 22, 2023	M107736
C2302149	Certificate of Analysis	Feb 22, 2023	M107736
C2302139	Certificate of Analysis	Feb 22, 2023	M107736
C2112310	Certificate of Analysis	Dec 13, 2022	M107736
C2112309	Certificate of Analysis	Dec 13, 2022	M107736
C2112308	Certificate of Analysis	Dec 13, 2022	M107736
J2015170	Certificate of Analysis	Aug 06, 2022	M107736
J2015169	Certificate of Analysis	Aug 06, 2022	M107736
I2017256	Certificate of Analysis	Jul 19, 2022	M107736
B2302456	Certificate of Analysis	Feb 28, 2022	M107736
C2223501	Certificate of Analysis	Feb 28, 2022	M107736
C2223499	Certificate of Analysis	Feb 28, 2022	M107736
A2220011	Certificate of Analysis	Feb 17, 2022	M107736

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Chemical and Physical Properties

Solubility	Fully miscible.
Refractive Index	1.42
Flash Point(°F)	68 °F
Flash Point(°C)	22 °C
Boil Point(°C)	104°C
Melt Point(°C)	2.6°C
Molecular Weight	84.120 g/mol
XLogP3	0.300
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	1
Exact Mass	84.0575 Da
Monoisotopic Mass	84.0575 Da
Topological Polar Surface Area	20.200 Å²
Heavy Atom Count	6
Formal Charge	0
Complexity	83.400
Isotope Atom Count	0
Defined Atom Stereocenter Count	0
Undefined Atom Stereocenter Count	0
Defined Bond Stereocenter Count	0
Undefined Bond Stereocenter Count	0
The total count of all stereochemical bonds	0
Covalently-Bonded Unit Count	1

Citations of This Product

How to Cite Aladdin Scientific Products?

1. Yuan Wang, Yuanbo Cai, Youquan Ling, Haoruo Zhang, Jinfeng Tian, Zhengguang Heng, Shengtai Zhou, Shuang Xia, Mei Liang, Huawei Zou. (2023) Improved Mechanical and Ablative Properties of PDMS Coatings Incorporating Epoxy as a Suspended Chain. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 62 (25): (9920–9931).
2. Jiaxing Tang, Chenhe Yao, Zhongwei An, Ran Chen, Zihao Mao, Xinbing Chen, Pei Chen. (2023) Balance the trade-offs between high birefringence, large dielectric anisotropy and low viscosity in nematic liquid crystals through molecular splicing strategy. LIQUID CRYSTALS,
3. Yuan Wang, Liwei Yan, Youquan Ling, Ying Ge, Congshu Huang, Shengtai Zhou, Shuang Xia, Mei Liang, Huawei Zou. (2023) Enhanced mechanical and adhesive properties of PDMS coatings via in-situ formation of uniformly dispersed epoxy reinforcing phase. PROGRESS IN ORGANIC COATINGS, 174 (107319).
4. Zhengyuan Zhang, Hongyu Yan, Zejun Yin, Yuechuan Wang. (2022) Photopolymerized and acetylene-functionlized polyacrylates for photoclickable elastomers. POLYMER, 238 (124415).
5. Yuan Wang, Yuanbo Cai, Hao Zhang, Ji Zhou, Shengtai Zhou, Yang Chen, Mei Liang, Huawei Zou. (2021) Mechanical and thermal degradation behavior of high-performance PDMS elastomer based on epoxy/silicone hybrid network. POLYMER, 236 (124299).
6. Zhengyuan Zhang, Yu Liu, Xiaochuan Shui, Youqing Yu, Chunyan Zheng, Yuechuan Wang. (2021) Free radical polymerization of acrylates bearing acetylene for preparation of clickable polymers. POLYMER, 228 (123906).
7. Jiajia Liu, Xiaochen Tang, Huiling Lu, Yingjie Xu. (2021) Insight into the Interactions between Azole-Anion-Based Ionic Liquids and Propargylic Alcohol: Influence on the Carboxylative Cyclization of Propargylic Alcohol with Carbon Dioxide. ACS Sustainable Chemistry & Engineering, 9 (14): (5050–5060).
8. Lingqi Huang, Kecheng Hu, Ganggang Ye, Zhibin Ye. (2021) Highly selective semi-hydrogenation of alkynes with a Pd nanocatalyst modified with sulfide-based solid-phase ligands. Molecular Catalysis, 506 (111535).
9. Guiling Shi, Ran Zhai, Haoran Li, Congmin Wang. (2021) Highly efficient synthesis of alkylidene cyclic carbonates from low concentration CO2 using hydroxyl and azolate dual functionalized ionic liquids. GREEN CHEMISTRY, 23 (1): (592-596).
10. Zhongzhe Wei, Zihao Yao, Qiang Zhou, Guilin Zhuang, Xing Zhong, Shengwei Deng, Xiaonian Li, Jianguo Wang. (2019) Optimizing Alkyne Hydrogenation Performance of Pd on Carbon in Situ Decorated with Oxygen-Deficient TiO2 by Integrating the Reaction and Diffusion. ACS Catalysis, 9 (12): (10656–10667).
11. Shanjun Mao, Bowen Zhao, Zhe Wang, Yutong Gong, Guofeng Lü, Xiao Ma, Lili Yu, Yong Wang. (2019) Tuning the catalytic performance for the semi-hydrogenation of alkynols by selectively poisoning the active sites of Pd catalysts. GREEN CHEMISTRY, 21 (15): (4143-4151).
12. Yanan Liu, Jiaying Zhao, Junting Feng, Yufei He, Yiyun Du, Dianqing Li. (2018) Layered double hydroxide-derived Ni-Cu nanoalloy catalysts for semi-hydrogenation of alkynes: Improvement of selectivity and anti-coking ability via alloying of Ni and Cu. JOURNAL OF CATALYSIS, 359 (251).
13. Lingfeng Shen, Shanjun Mao, Jianqing Li, Mingming Li, Ping Chen, Haoran Li, Zhirong Chen, Yong Wang. (2017) PdZn intermetallic on a CN@ZnO hybrid as an efficient catalyst for the semihydrogenation of alkynols. JOURNAL OF CATALYSIS, 350 (13).
14. Baohua Yue, Guangbo Zeng, Yepei Zhang, Sheng Tao, Xiaoming Zhang, Liuming Yan. (2017) Improved performance of acid-base composite of phosphonic acid functionalized polysulfone and triazolyl functionalized polysulfone for PEM fuel cells. SOLID STATE IONICS, 300 (10).
15. Ran Chen, Zhongwei An, Feng Li, Xinbing Chen, Pei Chen. (2016) Synthesis and physical properties of tolane liquid crystals containing 2,3-difluorophenylene and terminated by a tetrahydropyran moiety. LIQUID CRYSTALS,
16. Wenxin Wang, Ruidong Yang, Qiqi Mao, Xu Mu, Hongjie Yu, Kai Deng, Jianguo Wang, Liang Wang, Hongjing Wang. (2024) Electron Bridge Effect Induced by Oxygen-Bridged Ga on PdMo Bimetallene Nanoribbons for Boosting Electrocatalytic Alkynol Semihydrogenation. ADVANCED FUNCTIONAL MATERIALS, (2410614).
17. Xiong Jinqi, Mao Shanjun, Luo Qian, Ning Honghui, Lu Bing, Liu Yanling, Wang Yong. (2024) Mediating trade-off between activity and selectivity in alkynes semi-hydrogenation via a hydrophilic polar layer. Nature Communications, 15 (1): (1-10).
18. Cheng-Long Li, Rui-Ping Zhang, Lu Hou, Ya-Dong Xie, An-Hui Lu. (2025) Monolithic wood-based carbon supported Pd nanoparticles with tunable exposure for boosting semi-hydrogenation of alkynols. Catalysis Science & Technology,
19. Yan Gao, Dezheng Chang, Yuyang Luo, Haojie Yu, Jinhui Li, Kunming Liu. (2024) Synthesis of an Antipyrine-Based Fluorescent Probe with Synergistic Effects for the Selective Recognition of Zinc Ion. Minerals, 14 (7): (649).

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SKU	Size	Availability	Price
M107736-25ml	25ml	5	$17.90
M107736-100ml	100ml	8	$23.90
M107736-500ml	500ml	5	$41.90

2-Methyl-3-butyn-2-ol - 98%, high purity , CAS No.115-19-5