Heterocyclic Building Blocks

Fluorescein, ACROS Organics™

Chemical Name or Material: Fluorescein CAS: 2321-07-5 Purity Grade: Pure Molecular Formula: C20H12O5 Formula Weight: 332.3 MDL Number: MFCD00005050 2.5KG Fluorescein, pure

Propidium iodide, 95%, Acros Organics

Chemical Name or Material: Propidium iodide Assay Percent Range: 95% Molecular Formula: C27H34I2N4 Formula Weight: 668.39 1GR Propidium iodide, 95%

Polyvinylpyrrolidone-iodine complex, ACROS Organics™

Chemical Name or Material: Polyvinylpyrrolidone-iodine complex Assay: 9.0 to 12.0% (available iodine) (on dried substance) Linear Formula: (C6H9NO)n·xI MDL Number: MFCD00084483 Synonym: PVP-I 500GR Polyvinylpyrrolidone-iodine complex

Alfa Aesar™ 3-Acetylquinoline, 97%

Chemical Name or Material: 3-Acetylquinoline CAS: 33021-53-3 Molecular Formula: C11H9NO Formula Weight: 171.2 MDL Number: MFCD00030698 Synonym: Methyl quinolinyl ketone; 1-Quinolin-3-ylethanone 1GR 3-Acetylquinoline, 97%

Alfa Aesar™ 4-Hydroxypyridine, 97%

Chemical Name or Material: 4-Hydroxypyridine CAS: 626-64-2 Molecular Formula: C5H5NO Formula Weight: 95.1 MDL Number: MFCD00040458 Beilstein: 105800 Synonym: 4-Pyridinol; 4(1H)-Pyridone 4-HYDROXYPYRIDINE, TECH. 500G

Alfa Aesar™ N-(4-Bromophenyl)maleimide, 98%

Chemical Name or Material: N-(4-Bromophenyl)maleimide CAS: 13380-67-1 Molecular Formula: C10H6BrNO2 Formula Weight: 252.07 MDL Number: MFCD00030664 Beilstein: 513122 Synonym: 1-(4-Bromophenyl)-1H-pyrrole-2,5-dione N-(4-BROMOPHENYL)MALEIMIDE98%,25G

1,1'-Carbonyldiimidazole, 97%, ACROS Organics™

Chemical Name or Material: 1,1′-Carbonyldiimidazole CAS: 530-62-1 CAS Min %: 96.0 CAS Max %: 100.0 Assay: 97% Assay Percent Range: 97% Molecular Formula: C7H6N4O Formula Weight: 162.15 MDL Number: MFCD00005286 25GR 1,1'-Carbonyldiimidazole, 97%

Alfa Aesar™ 2-(3-Pyridyl)thiazolidine, 97%

Chemical Name or Material: 2-(3-Pyridyl)thiazolidine CAS: 700-93-6 Formula Weight: 166.24 MDL Number: MFCD01691463 Synonym: 3-(2-Thiazolidinyl)pyridine 1GR 2-(3-Pyridyl)thiazolidine, 97% 1g

Alfa Aesar™ Quinazoline, 98%

Chemical Name or Material: Quinazoline CAS: 253-82-7 Molecular Formula: C8H6N2 Formula Weight: 130.15 MDL Number: MFCD00006712 Merck Index: 14,8053 QUINAZOLINE, 98% 1G

Alfa Aesar™ 2-Chloro-3-cyano-5-phenylpyridine, 98%

Chemical Name or Material: 2-Chloro-3-cyano-5-phenylpyridine CAS: 10177-10-3 Molecular Formula: C12H7ClN2 Formula Weight: 214.66 MDL Number: MFCD00231610 Synonym: 2-Chloro-5-phenylnicotinonitrile; 2-Chloro-5-phenylpyridine-3-carbonitrile 2-CHLORO-5-PHENYLNICOTINONITRILE250MG

Alfa Aesar™ 2-(Phthalimido)ethanesulfonyl chloride, 97%

Chemical Name or Material: 2-(Phthalimido)ethanesulfonyl chloride CAS: 4403-36-5 Molecular Formula: C10H8ClNO4S Formula Weight: 273.7 MDL Number: MFCD01861217 UN Number: UN3261 2-PHTHALIMIDOETHANESULFONYL CHLORIDE5G

Alfa Aesar™ 10-Hydroxybenzo[h]quinoline, 98%

Chemical Name or Material: 10-Hydroxybenzo[h]quinoline CAS: 33155-90-7 Molecular Formula: C13H9NO Formula Weight: 195.22 MDL Number: MFCD00142350 Beilstein: 141770 10-HYDROXYBENZO(H)QUINOLINE,5G

Alfa Aesar™ 3,3'-Diethylthiadicarbocyanine perchlorate, 96%

Chemical Name or Material: 3,3'-Diethylthiadicarbocyanine perchlorate CAS: 22268-65-1 Molecular Formula: C23H23ClN2O4S2 Formula Weight: 491.12 MDL Number: MFCD06409265 1GR 3,3'-Diethylthiadicarbocyanine perchlorate, 96% 1g

Alfa Aesar™ 2-Amino-4-tert-butylthiazole, 98%

Chemical Name or Material: 2-Amino-4-tert-butylthiazole CAS: 74370-93-7 Molecular Formula: C7H12N2S Formula Weight: 156.26 MDL Number: MFCD00051644 Beilstein: 114270 Synonym: 4-tert-Butyl-2-thiazolamine 2-AMINO-4-TERT-BUTYLTHIAZOLE, 98%,1G

Alfa Aesar™ Glycidyl 2-methylphenyl ether, tech. 85%

Chemical Name or Material: Glycidyl 2-methylphenyl ether CAS: 2210-79-9 Purity Grade: Technical Grade Molecular Formula: C10H12O2 Formula Weight: 164.21 MDL Number: MFCD00037847 UN Number: UN3082 Beilstein: 4585 Synonym: o-Cresyl glycidyl ether; 2-(2-Methylphenoxymethyl)oxirane O-CRESYL GLYCIDYL ETHER, TECH. 85%,25G

Alfa Aesar™ 2,4-Dihydroxypyridine, 97%

Chemical Name or Material: 2,4-Dihydroxypyridine CAS: 626-03-9 Molecular Formula: C5H5NO2 Formula Weight: 111.1 MDL Number: MFCD00006273 Beilstein: 108533 Synonym: 4-Hydroxy-2-pyridone; 2,4-Pyridinediol 2,4-DIHYDROXYPYRIDINE, 97%5G

Alfa Aesar™ 6-Amino-3-cyano-2-methylpyridine, 97%

Chemical Name or Material: 6-Amino-3-cyano-2-methylpyridine CAS: 183428-90-2 Molecular Formula: C7H7N3 Formula Weight: 133.15 MDL Number: MFCD05865116 UN Number: UN3439 Synonym: 6-Amino-2-methylnicotinonitrile; 6-Amino-2-methylpyridine-3-carbonitrile 6-AMINO-3-CYANO-2-METHYLPYRIDINE, 98% 1G

Alfa Aesar™ 2,4,5,6-Tetrafluoropyrimidine, 95%

250MG 2,4,5,6-Tetrafluoropyrimidine, 95% 250mg

Alfa Aesar™ (S)-(+)-3-Amino-1-Boc-piperidine, 97%

Chemical Name or Material: (S)-(+)-3-Amino-1-Boc-piperidine CAS: 625471-18-3 Molecular Formula: C10H20N2O2 Formula Weight: 200.28 MDL Number: MFCD03094718 UN Number: UN2735 Synonym: (S)-Boc-3-piperidinamine; tert-Butyl (R)-3-aminopiperidine-1-carboxylate 250MG (S)-(+)-3-Amino-1-Boc-piperidine, 97% 250mg

Alfa Aesar™ Lithium 4,5-dicyano-2-(trifluoromethyl)imidazole, 95%

Chemical Name or Material: Lithium 4,5-dicyano-2-(trifluoromethyl)imidazole Molecular Formula: C6F3LiN4 Formula Weight: 192.03 MDL Number: MFCD18827480 Synonym: LiTDI 1GR Lithium 4,5-dicyano-2-(trifluoromethyl)imidazole, 95% 1g

4-Nitropyridine N-oxide, ACROS Organics™

Chemical Name or Material: 4-Nitropyridine N-oxide CAS: 1124-33-0 CAS Min %: 96.0 CAS Max %: 100.0 Assay: ≥96.0% Assay Percent Range: 97% Molecular Formula: C5H4N2O3 Formula Weight: 140.1 MDL Number: MFCD00006206 25GR 4-Nitropyridine N-oxide, 97%

Alfa Aesar™ Tris(2-thienyl)phosphine, 98+%

Chemical Name or Material: Tris(2-thienyl)phosphine CAS: 24171-89-9 Molecular Formula: C12H9PS3 Formula Weight: 280.37 MDL Number: MFCD00015471 Beilstein: 203736 Synonym: Tri(2-thienyl)phosphine TRIS(2-THIENYL)PHOSPHINE, 98+%,5G

Alfa Aesar™ 4-(6-Amino-3-pyridyl)-1-Boc-piperazine, 97%

Chemical Name or Material: 4-(6-Amino-3-pyridyl)-1-Boc-piperazine CAS: 571188-59-5 Molecular Formula: C14H22N2O4 Formula Weight: 278.35 MDL Number: MFCD11594962 Beilstein: 10173494 Synonym: tert-Butyl 4-(6-amino-3-pyridyl)piperazine-1-carboxylate 250MG 4-(6-Amino-3-pyridyl)-1-Boc-piperazine, 97% 250mg

N-Vinyl-2-pyrrolidinone, Stabilized 98%, ACROS Organics™

Chemical Name or Material: N-Vinyl-2-pyrrolidone Name Note: 98% CAS: 88-12-0 CAS Min %: 98.5 CAS Max %: 100.0 Assay: ≥98.5% Assay Percent Range: 99% Molecular Formula: C6H9NO Formula Weight: 111.14 MDL Number: MFCD00003197 Synonym: N-Vinylbutyrolactam 10LT N-Vinyl-2-pyrrolidone, 99%, stabilized with NaOH

Alfa Aesar™ gamma-Hexanolactone, 98%

Chemical Name or Material: gamma-Hexanolactone CAS: 695-06-7 Molecular Formula: C6H10O2 Formula Weight: 114.15 MDL Number: MFCD00005401 Beilstein: 107260 Synonym: gamma-Caprolactone; 5-Ethyldihydro-2(3H)-furanone GAMMA-HEXANOLACTONE, 98% 25G

Alfa Aesar™ Methyl 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylate, 96%

Chemical Name or Material: Methyl 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylate CAS: 350997-12-5 Molecular Formula: C12H10FNO2S Formula Weight: 251.28 MDL Number: MFCD01827715 Synonym: 2-Amino-4-(4-fluorophenyl)thiophene-3-carboxylic acid methyl ester 5GR Methyl 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylate, 96% 5g

Alfa Aesar™ N-(2-Hydroxyethyl)pyrrolidine, 97%

Chemical Name or Material: N-(2-Hydroxyethyl)pyrrolidine CAS: 2955-88-6 Molecular Formula: C6H13NO Formula Weight: 115.17 MDL Number: MFCD00003181 UN Number: UN1993 Beilstein: 102976 25ML N-(2-Hydroxyethyl)pyrrolidine, 97% 25ml

Alfa Aesar™ 4-Amino-1H-pyrazolo[3,4-d]pyrimidine, 98%

Chemical Name or Material: 4-Amino-1H-pyrazolo[3,4-d]pyrimidine CAS: 2380-63-4 Molecular Formula: C5H5N5 Formula Weight: 135.13 MDL Number: MFCD00005688 UN Number: UN2811 Beilstein: 5824 Synonym: 1H-Pyrazolo[3,4-d]pyrimidin-4-amine 4-AMINOPYRAZOLO(3,4-D)PYRIMIDINE, 98%,1G

Alfa Aesar™ Ethyl 1H-pyrazole-4-carboxylate, 98%

Chemical Name or Material: Ethyl 1H-pyrazole-4-carboxylate CAS: 37622-90-5 Molecular Formula: C6H8N2O2 Formula Weight: 140.14 MDL Number: MFCD00010844 Synonym: 1H-Pyrazole-4-carboxylic acid ethyl ester ETHYL PYRAZOLE-4-CARBOXYLATE, 98%5G

Alfa Aesar™ 3-Chlorothiophene-2-carboxylic acid, 99%

Chemical Name or Material: 3-Chlorothiophene-2-carboxylic acid CAS: 59337-89-2 Molecular Formula: C5H3ClO2S Formula Weight: 162.6 MDL Number: MFCD00043888 Beilstein: 121052 3-CHLOROTHIOPHENE-2-CARBOXYLIC ACID, 99%,1G