💛 99% Happy customers

📦 Same-day shipping on in-stock items

🌟 The Next Big Thing in Science

Heterocyclic Building Blocks

3724
Filters

  • 2,5-Furandicarboxylic acid

    Purity:
    ≥ 98% (Assay)
    Catalog Number:
    27410
    CAS Number:
    3238-40-2
    Purity Limit:
    ≥ 98% (Assay)
    MDL NO:
    MFCD00016582
    Molecular Formula:
    C6H4O5
    Molecular Weight:
    156.09
    Specification Sheet SDS

  • 4-Hydroxycoumarin

    Purity:
    ≥ 99%
    Synonym:
    4-Hydroxy-chromen-2-one
    Catalog Number:
    27086
    CAS Number:
    1076-38-6
    Purity Limit:
    ≥ 99%
    MDL NO:
    MFCD00006856
    Molecular Formula:
    C9H6O3
    Molecular Weight:
    162.14
    Specification Sheet SDS

  • N-Ethyl-2-pyrrolidinone

    Purity:
    ≥ 99.5% (GC)
    Synonym:
    1-Ethyl-2-pyrrolidone
    Catalog Number:
    26864
    CAS Number:
    2687-91-4
    Purity Limit:
    ≥ 99.5% (GC)
    MDL NO:
    MFCD00003199
    Molecular Formula:
    C6H11NO
    Molecular Weight:
    113.16
    Specification Sheet SDS

  • 2-Amino-1H-benzimidazole

    Purity:
    ≥ 99% (HPLC)
    Synonym:
    2-Aminobenzimidazole
    Catalog Number:
    26960
    CAS Number:
    934-32-7
    Purity Limit:
    ≥ 99% (HPLC)
    MDL NO:
    MFCD00005596
    Molecular Formula:
    C7H7N3
    Molecular Weight:
    133.15
    Specification Sheet SDS

  • Gramine

    Purity:
    ≥ 97% (HPLC)
    Synonym:
    3-(Dimethylaminomethyl)indole
    Catalog Number:
    26961
    CAS Number:
    87-52-5
    Purity Limit:
    ≥ 97% (HPLC)
    MDL NO:
    MFCD00005629
    Molecular Formula:
    C11H14N2
    Molecular Weight:
    174.25
    Specification Sheet SDS

  • 4-Methylthiazole

    Hazmat
    Purity:
    ≥ 99% (GC)
    Synonym:
    4-Methyl-1,3-thiazole
    Hazmat
    Catalog Number:
    26939
    CAS Number:
    693-95-8
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00005340
    Molecular Formula:
    C4H5NS
    Molecular Weight:
    99.16
    Specification Sheet SDS

  • 2-Methylimidazole

    Hazmat
    Purity:
    ≥ 99% (GC)
    Synonym:
    2-Methylglyoxaline
    Hazmat
    Catalog Number:
    26928
    CAS Number:
    693-98-1
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00005190
    Molecular Formula:
    C4H6N2
    Molecular Weight:
    82.11
    Specification Sheet SDS

  • 1,3,4-Thiadiazole-2,5-dithiol

    Hazmat
    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    2,5-Dimercaptothiadiazole
    Hazmat
    Catalog Number:
    26857
    CAS Number:
    1072-71-5
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00003103
    Molecular Formula:
    C2H2N2S3
    Molecular Weight:
    150.25
    Specification Sheet SDS

  • Ethyl 3,5-dimethyl-2-pyrrolecarboxylate

    Purity:
    ≥ 99% (GC)
    Synonym:
    3,5-Dimethyl-2-pyrrolecarboxylic acid ethyl ester
    Catalog Number:
    25026
    CAS Number:
    2199-44-2
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00010645
    Molecular Formula:
    C9H13NO2
    Molecular Weight:
    167.21
    Specification Sheet SDS

  • 3-(Bromoacetyl)pyridine hydrobromide

    Purity:
    ≥ 99% (Titration)
    Synonym:
    2-Bromo-1-(3-pyridyl)ethanone hydrobromide
    Catalog Number:
    24916
    CAS Number:
    17694-68-7
    Purity Limit:
    ≥ 99% (Titration)
    MDL NO:
    MFCD00052182
    Molecular Formula:
    C7H6BrNO·HBr
    Molecular Weight:
    280.95
    Specification Sheet SDS

  • 3-Methylpyrazole-5-carboxylic acid

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    5-Methyl-2H-pyrazole-3-carboxylic acid
    Catalog Number:
    24692
    CAS Number:
    402-61-9
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00462235
    Molecular Formula:
    C5H6N2O2
    Molecular Weight:
    126.11
    Specification Sheet SDS

  • 2-Methylpiperidine

    Hazmat
    Purity:
    ≥ 99% (GC)
    Synonym:
    2-Pipecoline
    Hazmat
    Catalog Number:
    24503
    CAS Number:
    109-05-7
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00005982
    Molecular Formula:
    C6H13N
    Molecular Weight:
    99.18
    Specification Sheet SDS

  • 2,4-Dichloropyrimidine

    Purity:
    ≥ 99% (HPLC)
    Catalog Number:
    24507
    CAS Number:
    3934-20-1
    Purity Limit:
    ≥ 99% (HPLC)
    MDL NO:
    MFCD00006061
    Molecular Formula:
    C4H2Cl2N2
    Molecular Weight:
    148.98
    Specification Sheet SDS

  • 3,5-Dimethylpyrazole

    Purity:
    ≥ 99.5% (HPLC)
    Catalog Number:
    24489
    CAS Number:
    67-51-6
    Purity Limit:
    ≥ 99.5% (HPLC)
    MDL NO:
    MFCD00005243
    Molecular Formula:
    C5H8N2
    Molecular Weight:
    96.13
    Specification Sheet SDS

  • 1-(Trimethylsilyl)imidazole

    Purity:
    ≥ 98% (GC)
    Synonym:
    N-Trimethylsilylimidazole
    Catalog Number:
    24490
    CAS Number:
    18156-74-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005280
    Molecular Formula:
    C6H12N2Si
    Molecular Weight:
    140.26
    Specification Sheet SDS

  • Dibenzothiazine

    Purity:
    ≥ 99% (Assay)
    Synonym:
    Phenothiazine
    Catalog Number:
    24482
    CAS Number:
    92-84-2
    Purity Limit:
    ≥ 99% (Assay)
    MDL NO:
    MFCD00005015
    Molecular Formula:
    C12H9NS
    Molecular Weight:
    199.28
    Specification Sheet SDS

  • 4-Benzylpiperidine

    Purity:
    ≥ 99% (GC)
    Synonym:
    4-(Phenylmethyl)piperidine
    Catalog Number:
    23231
    CAS Number:
    31252-42-3
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00006006
    Molecular Formula:
    C12H17N
    Molecular Weight:
    175.27
    Specification Sheet SDS

  • 2,3-Dimethylindole

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    2,3-Dimethyl-1H-indole
    Catalog Number:
    22059
    CAS Number:
    91-55-4
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00005617
    Molecular Formula:
    C10H11N
    Molecular Weight:
    145.2
    Specification Sheet SDS

  • 1,3-Propanesultone

    Hazmat
    Purity:
    ≥ 99% (GC)
    Synonym:
    1,2-Oxathiolane, 2,2-dioxide
    Hazmat
    Catalog Number:
    22005
    CAS Number:
    1120-71-4
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00005355
    Molecular Formula:
    C3H6O3S
    Molecular Weight:
    122.14
    Specification Sheet SDS

  • Flavone

    Purity:
    ≥ 99%
    Synonym:
    2-Phenyl-4H-1-benzopyran-4-one
    Catalog Number:
    21953
    CAS Number:
    525-82-6
    Purity Limit:
    ≥ 99%
    MDL NO:
    MFCD00006825
    Molecular Formula:
    C15H10O2
    Molecular Weight:
    222.24
    Specification Sheet SDS

  • 5-Benzyloxyindole

    Purity:
    ≥ 99% (HPLC)
    Synonym:
    5-Benzyloxy-1H-indole
    Catalog Number:
    21882
    CAS Number:
    1215-59-4
    Purity Limit:
    ≥ 99% (HPLC)
    MDL NO:
    MFCD00005676
    Molecular Formula:
    C15H13NO
    Molecular Weight:
    223.27
    Specification Sheet SDS

  • Umbelliferone

    Purity:
    98.5 - 101.5% (Assay by titration)
    Synonym:
    7-Hydroxycoumarin
    Catalog Number:
    21876
    CAS Number:
    93-35-6
    Purity Limit:
    98.5 - 101.5% (Assay by titration)
    MDL NO:
    MFCD00006878
    Molecular Formula:
    C9H6O3
    Molecular Weight:
    162.14
    Specification Sheet SDS

  • 4-Bromoindole

    Purity:
    ≥ 96% (HPLC)
    Synonym:
    4-Bromo-1H-indole
    Catalog Number:
    21855
    CAS Number:
    52488-36-5
    Purity Limit:
    ≥ 96% (HPLC)
    MDL NO:
    MFCD00671502
    Molecular Formula:
    C8H6BrN
    Molecular Weight:
    196.05
    Specification Sheet SDS

  • Indole-3-Carboxylic acid

    Purity:
    ≥ 99% (Assay)
    Synonym:
    1H-Indole-3-carboxylic acid
    Catalog Number:
    21865
    CAS Number:
    771-50-6
    Purity Limit:
    ≥ 99% (Assay)
    MDL NO:
    MFCD00005624
    Molecular Formula:
    C9H7NO2
    Molecular Weight:
    161.16
    Specification Sheet SDS

  • 7-Hydroxy-4-methylcoumarin

    Purity:
    ≥ 95% (Assay)
    Synonym:
    4-Methyl-7-hydroxycoumarin
    Catalog Number:
    21860
    CAS Number:
    90-33-5
    Purity Limit:
    ≥ 95% (Assay)
    MDL NO:
    MFCD00006866
    Molecular Formula:
    C10H8O3
    Molecular Weight:
    176.17
    Specification Sheet SDS

  • 4-Hydroxyindole

    Purity:
    ≥ 98% (Assay)
    Synonym:
    1H-Indol-4-ol
    Catalog Number:
    21841
    CAS Number:
    2380-94-1
    Purity Limit:
    ≥ 98% (Assay)
    MDL NO:
    MFCD00005667
    Molecular Formula:
    C8H7NO
    Molecular Weight:
    133.15
    Specification Sheet SDS

  • 2,3-Pyrazinedicarboxylic acid

    Purity:
    ≥ 99% (HPLC)
    Synonym:
    Pyrazine-2,3-dicarboxylic acid
    Catalog Number:
    21247
    CAS Number:
    89-01-0
    Purity Limit:
    ≥ 99% (HPLC)
    MDL NO:
    MFCD00006131
    Molecular Formula:
    C6H4N2O4
    Molecular Weight:
    168.11
    Specification Sheet SDS

  • 3,3'-Diindolylmethane

    Purity:
    ≥ 98% (Assay)
    Synonym:
    3-(1H-Indol-3-ylmethyl)-1H-indole
    Catalog Number:
    21231
    CAS Number:
    1968-05-4
    Purity Limit:
    ≥ 98% (Assay)
    MDL NO:
    MFCD00195766
    Molecular Formula:
    C17H14N2
    Molecular Weight:
    246.31
    Specification Sheet SDS

  • 3-Acetoxy-5-bromoindole

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    5-Bromo-1H-indol-3-yl acetate
    Catalog Number:
    21203
    CAS Number:
    17357-14-1
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00037933
    Molecular Formula:
    C10H8BrNO2
    Molecular Weight:
    254.08
    Specification Sheet SDS

  • 5-Methoxy-2-methylindole

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    5-Methoxy-2-methyl-1H-indole
    Catalog Number:
    21176
    CAS Number:
    1076-74-0
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00005620
    Molecular Formula:
    C10H11NO
    Molecular Weight:
    161.2
    Specification Sheet SDS

  • 1,3-Dimethyl-2-imidazolidinone

    Purity:
    ≥ 99% (GC)
    Synonym:
    N,N'-Dimethyl-ethylene-urea
    Catalog Number:
    12724
    CAS Number:
    80-73-9
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00003188
    Molecular Formula:
    C5H10N2O
    Molecular Weight:
    114.15
    Specification Sheet SDS

  • 2-Picolyl chloride hydrochloride

    Hazmat
    Purity:
    ≥ 98% (HPLC)
    Synonym:
    2-(Chloromethyl)pyridine hydrochloride
    Hazmat
    Catalog Number:
    06927
    CAS Number:
    6959-47-3
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00012811
    Molecular Formula:
    C6H6NCl·HCl
    Molecular Weight:
    164.04
    Specification Sheet SDS

  • 1-Phenylpiperazine

    Hazmat
    Purity:
    ≥ 98% (Assay)
    Synonym:
    N-Phenylpiperazine
    Hazmat
    Catalog Number:
    06901
    CAS Number:
    92-54-6
    Purity Limit:
    ≥ 98% (Assay)
    MDL NO:
    MFCD00005957
    Molecular Formula:
    C10H14N2
    Molecular Weight:
    162.24
    Specification Sheet SDS

  • 1H-Pyrazole

    Purity:
    ≥ 98% (GC)
    Synonym:
    1,2-Diazole
    Catalog Number:
    02354
    CAS Number:
    288-13-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005234
    Molecular Formula:
    C3H4N2
    Molecular Weight:
    68.08
    Specification Sheet SDS

  • 1-Acetylimidazole

    Purity:
    ≥ 98% (Titration)
    Catalog Number:
    02273
    CAS Number:
    2466-76-4
    Purity Limit:
    ≥ 98% (Titration)
    MDL NO:
    MFCD00005287
    Molecular Formula:
    C5H6N2O
    Molecular Weight:
    110.1
    Specification Sheet SDS

  • 2-Imidazolidone

    Purity:
    ≥ 99% (HPLC)
    Synonym:
    N,N'-Ethyleneurea
    Catalog Number:
    01974
    CAS Number:
    120-93-4
    Purity Limit:
    ≥ 99% (HPLC)
    MDL NO:
    MFCD00005257
    Molecular Formula:
    C3H6N2O
    Molecular Weight:
    86.09
    Specification Sheet SDS

  • 1H-1,2,4-Triazole

    Purity:
    ≥ 99% (HPLC)
    Synonym:
    Pyrrodiazole
    Catalog Number:
    00942
    CAS Number:
    288-88-0
    Purity Limit:
    ≥ 99% (HPLC)
    MDL NO:
    MFCD00005228
    Molecular Formula:
    C2H3N3
    Molecular Weight:
    69.07
    Specification Sheet SDS

  • Isatin

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    2,3-Indolinedione
    Catalog Number:
    00851
    CAS Number:
    91-56-5
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00005718
    Molecular Formula:
    C8H5NO2
    Molecular Weight:
    147.13
    Specification Sheet SDS

  • 6-Chloroguanine

    Purity:
    ≥ 99.0% (Assay)
    Synonym:
    2-Amino-6-chloropurine
    Catalog Number:
    00569
    CAS Number:
    10310-21-1
    Purity Limit:
    ≥ 99.0% (Assay)
    MDL NO:
    MFCD00075252
    Molecular Formula:
    C5H4ClN5
    Molecular Weight:
    169.58
    Specification Sheet SDS

  • 4-Aminoantipyrine

    Grade:
    ACS reagent
    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    4-Amino-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one
    Catalog Number:
    00417
    Grade:
    ACS reagent
    CAS Number:
    83-07-8
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00003145
    Molecular Formula:
    C11H13N3O
    Molecular Weight:
    203.25
    Specification Sheet SDS

  • 4-Methylumbelliferone sodium salt

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    7-Hydroxy-4-methylcoumarin
    Catalog Number:
    49326
    CAS Number:
    5980-33-6
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00069856
    Molecular Formula:
    C10H7NaO3
    Molecular Weight:
    198.15
    Specification Sheet SDS

  • 3-Aminopyridine

    Hazmat
    Purity:
    ≥ 99% (GC)
    Synonym:
    3-Pyridinamine
    Hazmat
    Catalog Number:
    49318
    CAS Number:
    462-08-8
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00006400
    Molecular Formula:
    C5H6N2
    Molecular Weight:
    94.11
    Specification Sheet

  • 3-Hydroxybenzoic acid

    Purity:
    ≥ 98% (GC)
    Synonym:
    m-Salicylic acid
    Catalog Number:
    49319
    CAS Number:
    99-06-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00002506
    Molecular Formula:
    C7H6O3
    Molecular Weight:
    138.12
    Specification Sheet SDS

  • 2-Cyanopyridine

    Purity:
    ≥ 99% (GC)
    Synonym:
    2-Pyridinecarbonitrile
    Catalog Number:
    46569
    CAS Number:
    100-70-9
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00006218
    Molecular Formula:
    C6H4N2
    Molecular Weight:
    104.11
    SDS

  • Methyl 3-bromothiophene-2-carboxylate

    Purity:
    ≥ 98% (GC)
    Synonym:
    3-Bromothiophene-2-carboxylic acid methyl ester
    Catalog Number:
    45009
    CAS Number:
    26137-08-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00173839
    Molecular Formula:
    C6H5BrO2S
    Molecular Weight:
    221.07
    Specification Sheet SDS

  • 2-Amino-4-chloro-5-formyl-3-thiophenecarbonitrile

    Hazmat
    Purity:
    ≥ 98% (GC)
    Synonym:
    2-Amino-4-chloro-3-cyano-5-formylthiophene
    Hazmat
    Catalog Number:
    45007
    CAS Number:
    104366-23-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD03788265
    Molecular Formula:
    C6H3ClN2OS
    Molecular Weight:
    186.61
    Specification Sheet SDS

  • 2,5-Diiodothiophene

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    45018
    CAS Number:
    625-88-7
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD00014525
    Molecular Formula:
    C4H2I2S
    Molecular Weight:
    335.93
    Specification Sheet SDS

  • Methyl 5-chlorothiophene-2-carboxylate

    Purity:
    ≥ 98% (GC)
    Synonym:
    5-Chlorothiophene-2-carboxylic acid methyl ester
    Catalog Number:
    45019
    CAS Number:
    35475-03-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD06203698
    Molecular Formula:
    C6H5ClO2S
    Molecular Weight:
    176.61
    Specification Sheet SDS

  • 4,6-Dichloro-1,3,5-triazin-2-amine

    Purity:
    ≥ 95% (HPLC)
    Synonym:
    2-Amino-4,6-dichloro-1,3,5-triazine
    Catalog Number:
    45041
    CAS Number:
    933-20-0
    Purity Limit:
    ≥ 95% (HPLC)
    MDL NO:
    MFCD00078331
    Molecular Formula:
    C3H2Cl2N4
    Molecular Weight:
    164.98
    Specification Sheet SDS

  • 3-Acetyl-2-(aminosulfonyl)-5-chlorothiophene

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    3-Acetyl-5-chloro-2-thiophenesulfonamide
    Catalog Number:
    45004
    CAS Number:
    160982-10-5
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD09033309
    Molecular Formula:
    C6H6ClNO3S2
    Molecular Weight:
    239.69
    Specification Sheet SDS
Back to top