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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Ethynyl, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Ethynyl impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Ethynyl-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Ethynyl Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"6-Chloro-4-[(2,2,3,3-d4-cyclopropylethynyl)trifluoromethylh... Stable Isotopes CS-T-50614 1189694-49-2 Enquire
[Ring-13C6]-1-Chloro-3-ethynylbenzene Stable Isotopes CS-EK-01185 766-83-6 unlabeled Enquire
[U-Ring-13C6]-Ethynylbenzene Stable Isotopes CS-EK-00584 536-74-3 unlabeled Enquire
1-​(tert-​Butyldimethylsilylox​y)​-​1-​ethynyl-​Cyclopropane... Stable Isotopes CS-T-94496 1246817-59-3 Enquire
1-(tert-Butyldimethylsilyloxy)-1-(2'-trimethylsilyl)ethynyl-... Stable Isotopes CS-T-50072 1246820-34-7 Enquire
17-(Ethynyl-13C2)-3-[(tetrahydro-2H-pyran-2-yl)oxy]-19-norpr... Stable Isotopes CS-T-102385 Not Available Enquire
17?-Ethynylestradiol-16,16-d2 3-Methyl Ether Stable Isotopes CS-C-01053 72-33-3 (Unlabelled) Enquire
17?-Ethynylestradiol-2,4,16,16-d4 3-Methyl Ether Stable Isotopes CS-C-01068 72-33-3 (Unlabelled) Enquire
17α-Ethynylestradiol 13C3 Stable Isotopes CS-EK-01486 57-63-6 unlabeled Enquire
1-Pentyl-4-[2-(trimethylsilyl)ethynyl]benzene-d7 Stable Isotopes CS-T-102764 138220-08-3(Unlabelled) Enquire
2-Amino-5-chloro-α-(cyclopropyl-d4-ethynyl)-4-isopropylsilyl... Stable Isotopes CS-T-47687 1216572-03-0 Enquire
2-Ethynylbiphenyl-13C6 Stable Isotopes CS-T-101393 Not Available Enquire
2-Methyl-d3 Ethynyl Estradiol Stable Isotopes CS-T-99478 Not Available Enquire
3-Ethynylaniline-d4 Stable Isotopes CS-T-92341 1794883-73-0 Enquire
5-Ethynyl-2’-deoxyuridine-d1 Stable Isotopes CS-T-96572 Not Available Enquire
Ethynyl Estradiol 3-Sulfate Sodium Salt-d4 (Major) Stable Isotopes CS-T-102804 724762-79-2 (Unlabelled) Enquire
Ethynyl Estradiol-13C2 Stable Isotopes CS-O-42582 2483735-63-1 Enquire
Ethynyl Estradiol-2,4,9,6,6,16,16- D7 Stable Isotopes CS-O-14062 57-63-6(Unlabeled) Enquire
Ethynyl Estradiol-d7 Stable Isotopes CS-T-99576 Not Available Enquire
Ethynyl-13C2-trimethylsilane Stable Isotopes CS-T-96715 285138-86-5 Enquire
Ethynyl-2 13C-benzene Stable Isotopes CS-T-54617 54522-92-8 Enquire
Ethynylbenzene 13C Stable Isotopes CS-T-54615 23351-79-3 Enquire
Ethynylbenzene 13C2 Stable Isotopes CS-T-54616 263012-32-4 Enquire
Ethynylestradiol-16,16-d2 ethynyl-13C2 Stable Isotopes CS-O-52760 57-63-6 (Unlabelled) Enquire


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"6,7-Bis(2-chloroethoxy)-N-(3-ethynylphenyl)-4-quinazolinami... API Standards CS-T-49245 183320-00-5 Enquire
2-Amino-3-ethynylpyrazine API Standards CS-M-54994 1005349-13-2 Enquire
3-[(2-Methyl-1,3-thiazol-4-yl)ethynyl]pyridine API Standards CS-T-59009 329205-68-7 Enquire
Ethynyltributylstannane API Standards CS-M-52560 994-89-8 Enquire
N-Ethynylpyrrole API Standards CS-T-76608 139565-93-8 Enquire


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
17-alpha-Ethynyl Estradiol-3-Sulfate Metabolites CS-P-07803 24560-70-1 Enquire
Ethynyl Estradiol Sulfate Metabolites CS-O-01448 724762-79-2 Enquire


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"(4-benzyl-3-(cyclohexylethynyl)-3,4-dihydro-2H-benzo[b][1,4... Impurities CS-EM-03303 1799616-61-7 Enquire
"(4S)-6-Chloro-4-(2-cyclopropylethynyl)-1,4-dihydro-4-(trifl... Impurities CS-T-50688 119047-14-2 Enquire
"2,2-Dimethyl-N-(3-trimethylsilanylethynyl-pyridin-2-yl)-pro... Impurities CS-M-15842 499193-46-3 Enquire
"5-Ethynyl-1-(2',3',5'-tri-O-tert-butyldimethylsilyl-β-... Impurities CS-T-54622 147212-83-7 Enquire
"N-(4-Ethynylphenyl)-5,7-dimethyl-pyrazolo[1,5-a]pyrimidine-... Impurities CS-T-76517 1380716-06-2 Enquire
(17α)-3-Ethynyl-19-norpregna-3,5-dien-20-yn-17-ol Impurities CS-T-54620 79727-03-0 Enquire
(2'S)-2'-Deoxy-2'-fluoro-5-ethynyluridine Impurities CS-T-51952 95740-26-4 Enquire
(4-benzyl-3-((trimethylsilyl)ethynyl)-3,4-dihydro-2H-benzo[b... Impurities CS-EM-03607 1799616-60-6 Enquire
(5S,8R,9S,13S,14S,17R)-13-Ethyl-17-ethynyl-17-hydroxy-2,4,5,... Impurities CS-O-59189 Not Available Enquire
(5-Trimethylsilanylethynyl-pyridin-2-yl)-carbamic acid tert-... Impurities CS-M-07935 470463-41-3 Enquire
(R)-5-Chloro-α-(cyclopropylethynyl)-2-amino-α-(trifluorometh... Impurities CS-T-50615 927812-33-7 Enquire
13beta-ethyl-11-methyliden-18,19-dinor 3,17-dihydroxy-3,17-d... Impurities CS-O-33240 350.49 Enquire
13beta-ethyl-11-methyliden-18,19-dinor 3-hydroxy-3-ethynyl-p... Impurities CS-O-33239 Not Available Enquire
17-alpha-Ethynyl Estradiol-3-Sulfate Triethylamine Salt Impurities CS-P-09239 24560-70-1 (free acid) Enquire
17-Desethynyl 17-Dibromomethylaceto-norethindrone Acetate Impurities CS-T-74074 40228-41-9 Enquire
17-epi-Ethynyl Estradiol Impurities CS-T-22087 4717-38-8 Enquire
1-Hydroxy-4-methyl-17-ethynyl-3-dehydroxyestradiol Impurities CS-T-78594 1034298-00-4 Enquire
1-Methyl Ethynyl Estradiol Impurities CS-T-58205 15071-66-6 Enquire
2-(3-Ethynylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane Impurities CS-T-77196 946168-04-3 Enquire
2,2-Dimethyl-N-(5-trimethylsilanylethynyl-pyridin-2-yl)-prop... Impurities CS-M-15796 470463-43-5 Enquire
2,7-Bis-(1-tert-butoxycarbonylpyrrol-2-yl)ethynyl-1,8-naphth... Impurities CS-T-49216 467435-77-4 Enquire
2-[4-(4-Chlorophenylethynyl)phenyl]-4,4,5,5-tetramethyl-1,3,... Impurities CS-T-72059 1315281-10-7 Enquire
2-Amino-5-chloro-α-(2-cyclopropylethynyl)-α-(trifl... Impurities CS-T-47675 168834-43-3 Enquire
2-Chloro-3-trimethylsilanylethynyl-pyridine Impurities CS-M-15793 470463-35-5 Enquire
2-Chloro-4-trimethylsilanylethynyl-nicotinic acid methyl est... Impurities CS-M-15797 470463-44-6 Enquire
2-Methyl Ethynyl Estradiol Impurities CS-T-58208 3240-39-9 Enquire
2-Methyl-6-(phenylethynyl)pyridine Impurities CS-M-47162 96206-92-7 Enquire
3-Dimethoxymethyl-5-trimethylsilanylethynyl-pyridine Impurities CS-M-15846 879326-80-4 Enquire
3-Phenylethynyl-benzaldehyde Impurities CS-M-07000 115021-39-1 Enquire
3-Propyl-2-(N-methyl-N-ethynylamino)pyridine Impurities CS-T-60846 1076199-36-4 Enquire
3-Trimethylsilanylethynyl-pyridine-2-carboxylic acid amide Impurities CS-M-15802 499193-54-3 Enquire
4-(3-Trimethylsilanylethynyl-pyridin-2-yl)-morpholine Impurities CS-M-15801 499193-56-5 Enquire
4-[2-(5,6,7,8-Tetrahydro-5,5-dimethyl-8-oxo-2-naphthalenyl)e... Impurities CS-T-43682 166978-49-0 Enquire
4-Bromo-1-ethynyl-2-fluorobenzene Impurities CS-DV-02627 302912-33-0 Enquire
4-chloro-2-ethynyl-1-methoxybenzene Impurities CS-DV-02713 95186-47-3 Enquire
4-Ethynylaniline Impurities CS-DV-02777 14235-81-5 Enquire
4-Ethynyl-phenol Impurities CS-DV-02778 2200-91-1 Enquire
4-ethynylpyrimidine Impurities CS-DV-02780 1196146-58-3 Enquire
4-Methyl Ethynyl Estradiol Impurities CS-T-58206 155683-61-7 Enquire
5-Ethynyl Uridine CEP Impurities CS-T-75464 1193451-06-7 Enquire
5-Ethynyl-1-(-β-D-ribofuranosyl)-imidazo-4-carbonitrile Impurities CS-T-54621 126004-13-5 Enquire
5-Ethynyl-2'-deoxycytidine Impurities CS-T-54618 69075-47-4 Enquire
5-Ethynyl-2'-deoxyuridine Impurities CS-T-54619 61135-33-9 Enquire
5-Ethynyluridine Impurities CS-T-75902 69075-42-9 Enquire
6-Ethynyl-4,4-dimethyl-thiochroman Impurities CS-O-32210 118292-06-1 In Stock
6-ethynylnicotinic acid ethyl ester Impurities CS-O-56577 220882-43-9 Enquire
6-Keto Ethynyl Estradiol Impurities CS-T-57001 38002-18-5 In Stock
6-α-Hydroxy Ethynyl Estradiol Impurities CS-T-56010 27521-34-2 In Stock
9,11-Dehydro Ethynyl Estradiol Impurities CS-O-05547 1231-96-5 In Stock
Deschloroethyl Bendamustine ethynylamide impurity Impurities CS-O-45282 Not Available Enquire
Desethynyl Erlotinib Impurities CS-T-73717 1145671-52-8 In Stock
Ethynyl Estradiol 17-Acetate Impurities CS-T-54229 21221-29-4 Enquire
Ethynyl Estradiol Diacetate Impurities CS-T-54231 13258-68-9 Enquire
Ethynylestradiol Impurity M Impurities CS-P-07805 1818-11-7 Enquire
N-(2-ethynylphenyl)-6,7-bis(2-methoxyethoxy)quinazolin-4-ami... Impurities CS-O-37083 Not Available Enquire
N-(3-Desethynylphenyl)-N-(3-(1-chlorovinyl)phenyl) Erlotinib Impurities CS-O-33361 2204518-92-1 Enquire
N-(4-ethynylphenyl)-6,7-bis(2-methoxyethoxy)quinazolin-4-ami... Impurities CS-O-37082 1029721-32-1 Enquire
tert-Butyl 2-iodo-6-((trimethylsilyl)ethynyl)-pyridin-3-yl c... Impurities CS-M-24228 1142192-40-2 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"(R)-4-Ethynyl-2,2-dimethyl-1,3-dioxolane" Intermediates CS-T-77544 186521-82-4 Enquire
"1-(4-{2-[4-(2,5-dimethyl-1H-pyrrol-1-yl)phenyl]ethynyl}phen... Intermediates CS-EL-08995 477845-53-7 Enquire
"1,2,4-Trichloro-5-ethynyl-benzene" Intermediates CS-T-87606 6546-87-8 Enquire
"1,4-Diethynylbenzene" Intermediates CS-EL-01108 935-14-8 Enquire
"2-((tert-Butyldimethylsilyloxy)methyl)-6-((trimethylsilyl)e... Intermediates CS-M-35326 1171920-57-2 Enquire
"2,2-Dimethyl-1-(6-((trimethylsilyl)ethynyl)-3,4-dihydro-1,8... Intermediates CS-AC-11296 1222533-79-0 Enquire
"2,3-Dimethoxy-5-((trimethylsilyl)ethynyl)pyridine" Intermediates CS-M-35271 1171919-88-2 Enquire
"2,3-Dimethoxy-6-((trimethylsilyl)ethynyl)pyridine" Intermediates CS-M-35269 1171919-83-7 Enquire
"2,7-Bis-(1H-pyrrol-2-yl)ethynyl-1,8-naphthridine" Intermediates CS-T-49321 467435-64-9 Enquire
"2-[4-(4-Methoxyphenylethynyl)phenyl]-4,4,5,5-tetramethyl-1,... Intermediates CS-AC-06453 1190376-24-9 Enquire
"2-Ethynyl-4,6-difluoroaniline" Intermediates CS-H-00484 684250-12-2 Enquire
"2-Ethynylpyrrole-1-carboxylic Acid, t-Butyl Ester" Intermediates CS-T-23275 467435-75-2 Enquire
"3,5-Diethynylpyrazin-2-amine" Intermediates CS-EL-00942 1588440-99-6 Enquire
"4,4,5,5-Tetramethyl-2-(3-trimethylsilanylethynyl-phenyl)-[1... Intermediates CS-EL-00370 915402-03-8 Enquire
"4,4-Dimethyl-7-ethynyl-1-tetralone" Intermediates CS-T-20199 166978-48-9 Enquire
"4-[2-(trimethylsilyl)ethynyl]-1H-indole-2,3-dione" Intermediates CS-EL-04506 1192263-95-8 Enquire
"4-Ethynyl-2,6-difluoroaniline" Intermediates CS-H-00483 753501-37-0 Enquire
"4-Ethynylpyridine, HCl" Intermediates CS-AC-11350 352530-29-1 Enquire
"5-Chloro-1-(triisopropylsilyl)-4-((trimethylsilyl) -ethynyl... Intermediates CS-M-43852 1261365-96-1 Enquire
"5-Fluoro-4-((trimethylsilyl)ethynyl)-1h-pyrrolo-[2,3-b]pyri... Intermediates CS-AC-09520 1228666-01-0 Enquire
"6-[2(Trimethylsilyl)-1-ethynyl]-1,3-benzodioxole-5-vinylmet... Intermediates CS-T-87802 1346602-58-1 Enquire
"6-Ethynylfuro[3,2-b]pyridine" Intermediates CS-AC-11233 1203499-35-7 Enquire
"7-((Trimethylsilyl)ethynyl)-2,3-dihydro-[1,4]dioxino[2,3-b]... Intermediates CS-M-43922 1261365-41-6 Enquire
"Trimethyl((4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)ethy... Intermediates CS-EL-05346 159087-46-4 Enquire
((4-((4-Fluorophenyl)ethynyl)phenyl)ethynyl)trimethylsilane Intermediates CS-ED-41428 910467-79-7 Enquire
(1-Ethynylcyclopentyl)benzene Intermediates CS-ED-28254 1092352-06-1 Enquire
(1-Ethynylcyclopropyl)methanamine Intermediates CS-ED-28163 933706-06-0 Enquire
(1R,2S)-2-(2-phenylethynyl)cyclopentan-1-ol Intermediates CS-ED-34006 912361-58-1 Enquire
(2-Ethynylcyclopropyl)benzene Intermediates CS-ED-27886 91348-21-9 Enquire
(3-Ethynylphenyl)urea Intermediates CS-ED-16661 1017034-89-7 Enquire
(4-((Trimethylsilyl)ethynyl)phenyl)methanamine Intermediates CS-ED-16017 721968-86-1 Enquire
(4-Chlorophenylethynyl)trimethylsilane Intermediates CS-M-53115 78704-49-1 Enquire
(4-methoxycarbonylphenyl)ethynyl bromide Intermediates CS-DV-00202 225928-10-9 Enquire
(S)-4-Ethynyl-2,2-dimethyl-1,3-dioxolane Intermediates CS-T-77915 56017-85-7 Enquire
1-(2-Ethynylphenyl)ethanone Intermediates CS-ED-29040 104190-22-9 Enquire
1-(3-Ethynylphenyl)-3,3-dimethyl-2-azetanone Intermediates CS-M-31427 886361-64-4 Enquire
1-(3-ethynylphenyl)bicyclo[1.1.1]pentane Intermediates CS-EM-01078 1823936-00-0 Enquire
1-(4-ethynylphenyl)bicyclo[1.1.1]pentane Intermediates CS-EM-01079 1823343-65-2 Enquire
1-(benzyloxy)-4-ethynylbenzene Intermediates CS-EL-07553 84284-70-8 Enquire
1-(tert-Butyldimethylsilyloxy)-1-(2'-trimethylsilyl)ethynylc... Intermediates CS-T-50071 1246816-70-5 Enquire
1,4-Bis[(trimethylsilyl)ethynyl]benzene Intermediates CS-ED-13546 17938-13-5 Enquire
1-[2-(4-bromophenyl)ethynyl]-2-fluoro-4-pentylbenzene Intermediates CS-EL-01119 477860-08-5 Enquire
1-[2-(Trimethylsilyl)ethynyl]cyclopentan-1-ol Intermediates CS-ED-16000 71321-24-9 Enquire
10-bromo-9-(phenylethynyl)anthracene Intermediates CS-DV-00802 115198-11-3 Enquire
16-Oxo Ethynyl Estradiol Intermediates CS-T-60074 1350468-76-6 Enquire
17-Ethynylestriol Intermediates CS-T-54232 4717-40-2 Enquire
18-Methyl Ethynyl Estradiol Intermediates CS-T-58207 14012-72-7 Enquire
1-benzyl-4-ethynyl-1H-pyrazole Intermediates CS-ED-16845 905751-62-4 Enquire
1-BOC-3-ETHYNYL-3-METHYLAZETIDINE Intermediates CS-ED-42197 1363381-76-3 Enquire
1-Boc-3-Ethynylpyrrolidine Intermediates CS-EL-04402 287193-00-4 Enquire
1-Boc-4-ethynylpiperidine Intermediates E020814 287192-97-6 Enquire
1-bromo-1-ethynylcyclopropane Intermediates CS-O-49043 2763756-15-4 Enquire
1-Bromo-2-ethynyl-4-methylbenzene Intermediates CS-ED-13154 2196194-33-7 Enquire
1-Bromo-4-chloro-2-ethynylbenzene Intermediates CS-ED-13155 1268870-34-3 Enquire
1-Bromo-4-ethynyl-2-fluorobenzene Intermediates CS-DV-00862 1191063-07-6 Enquire
1-Bromo-4-ethynylnaphthalene Intermediates CS-O-43205 524062-19-9 Enquire
1-bromo-8-ethynyl Naphthalene Intermediates CS-O-43199 62358-92-3 Enquire
1-Chloro-4-ethynylnaphthalene Intermediates CS-O-43204 1394284-80-0 Enquire
1-chloro-8-ethynyl Naphthalene Intermediates CS-O-43200 2755968-48-8 Enquire
1-Chloro-9,10-bis(2-phenylethynyl)anthracene Intermediates CS-T-72487 41105-35-5 Enquire
1-Ethoxy-2-ethynylbenzene Intermediates CS-ED-28651 90843-12-2 Enquire
1-Ethyl-4-((4-(trans-4-propylcyclohexyl)phenyl)ethynyl)benze... Intermediates CS-ED-28888 107949-21-3 Enquire
1-Ethynyl-1-(triisopropylsilyloxy)cyclopropane Intermediates CS-T-23279 1246814-98-1 Enquire
1-Ethynyl-2,4-difluorobenzene Intermediates CS-M-44286 302912-34-1 Enquire
1-Ethynyl-2-fluorobenzene Intermediates CS-T-75437 766-49-4 Enquire
1-Ethynyl-4-(phenylethynyl)benzene Intermediates CS-ED-29086 92866-00-7 Enquire
1-Ethynyl-4-isopropoxy-benzene Intermediates CS-ED-16679 91142-24-4 Enquire
1-Ethynyl-4-nitronaphthalene Intermediates CS-O-43206 1088651-55-1 Enquire
1-ethynyl-8-methyl Naphthalene Intermediates CS-O-43202 65265-94-3 Enquire
1-Ethynylcyclobutan-1-ol Intermediates CS-ED-28162 98135-75-2 Enquire
1-Ethynylcyclohexanol Intermediates CS-T-23269 78-27-3 Enquire
1-Ethynylcyclohexene Intermediates CS-ED-28958 931-49-7 Enquire
1-Ethynylcyclopropanecarboxylic acid Intermediates CS-ED-29055 933755-97-6 Enquire
1-Ethynylpyrazole Intermediates CS-ED-28041 103244-40-2 Enquire
1-methyl-4-[(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)eth... Intermediates CS-ED-16132 1487353-22-9 Enquire
1-nitro-8-ethynyl naphthalene Intermediates CS-O-43201 Not Available Enquire
2-((3-ethynyloxetan-3-yl)(phenyl)amino)ethan-1-ol Intermediates CS-EM-02274 1799616-32-2 Enquire
2-((3-Ethynyloxetan-3-yl)oxy)acetic acid Intermediates CS-EM-00549 1379811-83-2 Enquire
2-((Trimethylsilyl)ethynyl)pyridin-3-amine Intermediates CS-M-35255 947330-64-5 Enquire
2-((Trimethylsilyl)ethynyl)pyridin-3-ol Intermediates CS-M-35251 556832-92-9 Enquire
2-(2-Ethynylphenyl)acetic acid Intermediates CS-ED-16678 936693-17-3 Enquire
2-(Cyclopropylethynyl)benzaldehyde Intermediates CS-ED-23687 914220-97-6 Enquire
2-(Phenylethynyl)benzoic acid Intermediates CS-ED-32920 1084-95-3 Enquire
2,2,2-trifluoroethyl N-(3-ethynylphenyl)carbamate Intermediates CS-ED-21142 1087798-02-4 Enquire
2,2''-diethynyl-1,1':3',1''-terphenyl Intermediates CS-O-48965 2618348-89-1 Enquire
2-[(3-Ethynylphenyl)amino]-1-(morpholin-4-yl)ethan-1-one Intermediates CS-ED-16641 1021083-28-2 Enquire
2-[(3-ethynylphenyl)amino]-N-methylacetamide Intermediates CS-ED-16658 1020974-72-4 Enquire
2-[(Trimethylsilyl)ethynyl]benzaldehyde Intermediates CS-CE-00347 77123-58-1 Enquire
2-Amino-2-(4-ethynylphenyl)acetic acid Intermediates CS-ED-38492 1822548-33-3 Enquire
2-amino-3-ethynyl-5-(trifluoromethyl)benzenecarbonitrile Intermediates CS-EL-07302 1221792-72-8 Enquire
2-Amino-4-ethynylphenol Intermediates CS-T-47826 70239-82-6 Enquire
2-amino-5-(trifluoromethyl)-3-[2-(trimethylsilyl)ethynyl]ben... Intermediates CS-EL-01817 1221792-67-1 Enquire
2-Amino-5-bromo-3-ethynylpyrazine Intermediates CS-M-54993 1209289-08-6 Enquire
2-Amino-5-chloro-alpha-(cyclopropylethynyl)-4-isopropylsilyl... Intermediates CS-ED-04644 1159977-02-2 Enquire
2-amino-N-(3-ethynylphenyl)acetamide hydrochloride Intermediates CS-ED-08928 1193389-71-7 Enquire
2-Bromo-4-ethynyl-1-fluorobenzene Intermediates CS-ED-16999 918487-39-5 Enquire
2-Bromo-4-ethynylpyridine Intermediates CS-ED-16305 1196156-17-8 Enquire
2-Bromo-5-ethynylpyridine Intermediates CS-T-49756 569672-28-2 Enquire
2-Bromo-5-ethynylpyrimidine Intermediates CS-T-67257 1797890-53-9 Enquire
2-Bromo-5-ethynylthiophene Intermediates CS-ED-16301 105995-73-1 Enquire


Glucuronides

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethynyl Estradiol 17-β-D-Glucuronide Glucuronides CS-T-54227 75803-39-3 Enquire
Ethynyl Estradiol 17-Acetate-β-(2',3',4'-Tri-O-acetyl)-... Glucuronides CS-T-54230 242130-33-2 Enquire
Ethynylestradiol-β-D-Glucuronide Glucuronides CS-T-54226 60134-76-1 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(2-Thienylethynyl)trimethylsilane Fine Chemicals CS-MM-05958 40231-03-6 Enquire
(4-Ethynylphenyl)methanamine Fine Chemicals CS-MM-47118 197844-23-8 Enquire
1,4-Diethynyl-2,5-dimethoxybenzene Fine Chemicals CS-DE-01427 74029-40-6 Enquire
2-​bromoethynylbenzene Fine Chemicals CS-N-05218 932-87-6 Enquire
2-Ethynylpyridine Fine Chemicals CS-M-57120 1945-84-2 Enquire
3-ethynylpyridazine Fine Chemicals CS-EM-03190 1017793-08-6 Enquire
4-((3,5-dimethoxyphenyl)ethynyl)benzoic acid Fine Chemicals CS-O-38060 2244096-11-3 Enquire
4-((3,5-dimethoxyphenyl)ethynyl)benzonitrile Fine Chemicals CS-O-38059 2244096-10-2 Enquire
4'-Ethynyl-2-Fluoro-2'-Deoxyadenosine Fine Chemicals CS-ED-02381 865363-93-5 Enquire
4-ethynyloxan-4-ol Fine Chemicals CS-EM-03119 57385-16-7 Enquire
ethyl 4-((3,5-dimethoxyphenyl)ethynyl)benzoate Fine Chemicals CS-O-38058 685570-37-0 Enquire
tert-Butyl (1-ethynylcyclopropyl)carbamate Fine Chemicals CS-MM-67102 1268810-09-8 Enquire
Tributyl(phenylethynyl)tin Fine Chemicals CS-M-53354 3757-88-8 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"5-Ethynyl-1,2,3-trifluorobenzene" Building Blocks CS-DV-03118 158816-55-8 Enquire
(2-Ethynylphenyl)boronic acid Building Blocks CS-T-77931 905926-85-4 Enquire
1-Ethynyl-3-(trifluoromethoxy)-benzene Building Blocks CS-T-75190 866683-57-0 Enquire
4-Ethynyltoluene Building Blocks CS-ED-02197 766-97-2 Enquire
B-(3-Ethynylphenyl)-boronic acid Building Blocks CS-T-77074 1189127-05-6 Enquire