💛 99% Happy customers

📦 Same-day shipping on in-stock items

🌟 Join our Rewards Program

Heterocyclic Building Blocks

3724

  • 2,2'-Bipyrimidyl

    Purity:
    ≥ 95% (GC)
    Synonym:
    2,2'-Bipyrimidine
    Catalog Number:
    40920
    CAS Number:
    34671-83-5
    Purity Limit:
    ≥ 95% (GC)
    MDL NO:
    MFCD00014600
    Molecular Formula:
    C8H6N4
    Molecular Weight:
    158.16
    Specification Sheet SDS

  • Quinuclidine

    Hazmat
    Purity:
    ≥ 96% (GC)
    Synonym:
    1-Azabicyclo[2.2.2]octane
    Hazmat
    Catalog Number:
    40884
    CAS Number:
    100-76-5
    Purity Limit:
    ≥ 96% (GC)
    MDL NO:
    MFCD00006690
    Molecular Formula:
    C7H13N
    Molecular Weight:
    111.19
    Specification Sheet SDS

  • Sodium pyrimidine-2-sulfinate

    Purity:
    ≥ 97% (HPLC)
    Catalog Number:
    40769
    CAS Number:
    2188151-68-8
    Purity Limit:
    ≥ 97% (HPLC)
    MDL NO:
    MFCD32068077
    Molecular Formula:
    C4H3N2NaO2S
    Molecular Weight:
    166.13
    Specification Sheet SDS

  • 5-Formyl-2-thiopheneboronic acid

    Purity:
    ≥ 96% (HPLC)
    Synonym:
    5-Formyl-2-thienylboronic acid
    Catalog Number:
    40394
    CAS Number:
    4347-33-5
    Purity Limit:
    ≥ 96% (HPLC)
    MDL NO:
    MFCD02093666
    Molecular Formula:
    C5H5BO3S
    Molecular Weight:
    155.96
    Specification Sheet SDS

  • 5-Formyl-2-furanboronic acid

    Hazmat
    Purity:
    95 - 105% (Assay by titration)
    Synonym:
    5-Formyl-2-furanylboronic acid
    Hazmat
    Catalog Number:
    40376
    CAS Number:
    27329-70-0
    Purity Limit:
    95 - 105% (Assay by titration)
    MDL NO:
    MFCD01114696
    Molecular Formula:
    C5H5BO4
    Molecular Weight:
    139.9
    Specification Sheet SDS

  • 1-Methyl-4-[3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl]piperazine

    Purity:
    ≥ 98% (GC)
    Synonym:
    3-(4-Methyl-1-piperazinylmethyl)benzeneboronic acid pinacol ester
    Catalog Number:
    40157
    CAS Number:
    883738-27-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD09266181
    Molecular Formula:
    C18H29BN2O2
    Molecular Weight:
    316.25
    SDS

  • 3-Chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine

    Purity:
    ≥ 98% (GC)
    Synonym:
    2-(5-Chloro-3-pyridyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
    Catalog Number:
    40042
    CAS Number:
    865186-94-3
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD06798284
    Molecular Formula:
    C11H15BClNO2
    Molecular Weight:
    239.51
    Specification Sheet SDS

  • 2-n-Butylimidazole

    Purity:
    ≥ 99% (Assay)
    Synonym:
    2-Butyl-1-H-imidazole
    Catalog Number:
    28396
    CAS Number:
    50790-93-7
    Purity Limit:
    ≥ 99% (Assay)
    MDL NO:
    MFCD00792664
    Molecular Formula:
    C7H12N2
    Molecular Weight:
    124.19
    Specification Sheet SDS

  • 4,4,5,5-Tetramethyl-2-(5-methylfuran-2-yl)-1,3,2-dioxaborolane

    Purity:
    ≥ 97% (GC)
    Synonym:
    (5-Methylfuran-2-yl)boronic acid pinacol ester
    Catalog Number:
    39914
    CAS Number:
    338998-93-9
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD03094689
    Molecular Formula:
    C11H17BO3
    Molecular Weight:
    208.06
    Specification Sheet SDS

  • 5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)oxindole

    Purity:
    ≥ 96% (GC)
    Synonym:
    5-Oxindoleboronic acid pinacol ester
    Catalog Number:
    39884
    CAS Number:
    837392-64-0
    Purity Limit:
    ≥ 96% (GC)
    MDL NO:
    MFCD08669935
    Molecular Formula:
    C14H18BNO3
    Molecular Weight:
    259.11
    Specification Sheet SDS

  • 4'-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)[1,1'-biphenyl]-4-carbonitrile

    Purity:
    ≥ 96% (GC)
    Synonym:
    4-Cyanobiphenyl-4'-boronic acid pinacol ester
    Catalog Number:
    39949
    CAS Number:
    406482-72-2
    Purity Limit:
    ≥ 96% (GC)
    MDL NO:
    MFCD17015781
    Molecular Formula:
    C19H20BNO2
    Molecular Weight:
    305.18
    Specification Sheet SDS

  • 1-(Tetrahydro-2H-pyran-4-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole

    Purity:
    ≥ 98% (GC)
    Synonym:
    1-(Tetrahydro-2H-pyran-4-yl)-1H-pyrazole-4-boronic acid pinacol ester
    Catalog Number:
    39968
    CAS Number:
    1040377-03-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD12033229
    Molecular Formula:
    C14H23BN2O3
    Molecular Weight:
    278.16
    Specification Sheet SDS

  • 4-(Bromomethyl)-7-(diethylamino)coumarin

    Purity:
    ≥ 97% (HPLC)
    Catalog Number:
    39725
    CAS Number:
    1256259-14-9
    Purity Limit:
    ≥ 97% (HPLC)
    MDL NO:
    MFCD31618098
    Molecular Formula:
    C14H16BrNO2
    Molecular Weight:
    310.19
    Specification Sheet SDS

  • 6-Bromo-7-hydroxy-4-(hydroxymethyl)coumarin

    Purity:
    ≥ 96% (GC)
    Synonym:
    6-Bromo-7-hydroxy-4-(hydroxymethyl)-2H-chromen-2-one
    Catalog Number:
    39724
    CAS Number:
    223420-41-5
    Purity Limit:
    ≥ 96% (GC)
    MDL NO:
    MFCD25961202
    Molecular Formula:
    C10H7BrO4
    Molecular Weight:
    271.07
    Specification Sheet SDS

  • 7-(Diethylamino)-4-(hydroxymethyl)coumarin

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    39726
    CAS Number:
    54711-38-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD03424352
    Molecular Formula:
    C14H17NO3
    Molecular Weight:
    247.29
    Specification Sheet SDS

  • 2-([1,1'-Biphenyl]-3-yl)-4-chloro-6-phenyl-1,3,5-triazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    39367
    CAS Number:
    1689576-03-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD30531632
    Molecular Formula:
    C21H14ClN3
    Molecular Weight:
    343.81
    Specification Sheet SDS

  • Metamitron

    Hazmat
    Purity:
    ≥ 98% (Assay by titration, GC)
    Synonym:
    4-Amino-3-methyl-6-phenyl-1,2,4-triazin-5-one
    Hazmat
    Catalog Number:
    39339
    CAS Number:
    41394-05-2
    Purity Limit:
    ≥ 98% (Assay by titration, GC)
    MDL NO:
    MFCD00055524
    Molecular Formula:
    C10H10N4O
    Molecular Weight:
    202.22
    Specification Sheet SDS

  • 2,3,5,6-Tetrachloro-4-(methylsulfonyl)pyridine

    Purity:
    ≥ 95% (GC)
    Synonym:
    Davicil
    Catalog Number:
    39332
    CAS Number:
    13108-52-6
    Purity Limit:
    ≥ 95% (GC)
    MDL NO:
    MFCD00054553
    Molecular Formula:
    C6H3Cl4NO2S
    Molecular Weight:
    294.96
    Specification Sheet SDS

  • 3-Methyl-2-benzothiazolinonehydrazone hydrochloride [for Biochemical Research]

    Hazmat
    Purity:
    ≥ 98% (Assay by titration, HPLC)
    Synonym:
    MBTH hydrochloride
    Hazmat
    Catalog Number:
    39282
    CAS Number:
    4338-98-1
    Purity Limit:
    ≥ 98% (Assay by titration, HPLC)
    MDL NO:
    MFCD00149370
    Molecular Formula:
    C8H9N3S·HCl
    Molecular Weight:
    215.7
    Specification Sheet SDS

  • Linalool oxide (mixture of isomers)

    Hazmat
    Purity:
    ≥ 97% (GC)
    Synonym:
    Linalyl oxide (mixture of isomers)
    Hazmat
    Catalog Number:
    39223
    CAS Number:
    60047-17-8
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD00053543
    Molecular Formula:
    C10H18O2
    Molecular Weight:
    170.25
    Specification Sheet SDS

  • Adenine hydrochloride hydrate

    Grade:
    Suitable for cell culture
    Purity:
    ≥ 99% (HPLC)
    Synonym:
    6-Aminopurine hydrochloride hydrate
    Catalog Number:
    38833
    Grade:
    Suitable for cell culture
    CAS Number:
    2922-28-3, 6055-72-7
    Purity Limit:
    ≥ 99% (HPLC)
    MDL NO:
    MFCD00075782
    Molecular Formula:
    C5H5N5·HCl·xH2O
    Molecular Weight:
    171.6
    Specification Sheet SDS

  • Indanthrone

    Grade:
    CI 69800
    Purity:
    ≥ 97%
    Catalog Number:
    38655
    Grade:
    CI 69800
    CAS Number:
    81-77-6
    Purity Limit:
    ≥ 97%
    MDL NO:
    MFCD00046964
    Molecular Formula:
    C28H14N2O4
    Molecular Weight:
    442.43
    Specification Sheet SDS

  • 4,4'-Bis(5-methyl-2-benzoxazolyl)stilbene

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    38548
    CAS Number:
    2397-00-4
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00191316
    Molecular Formula:
    C30H22N2O2
    Molecular Weight:
    442.52
    Specification Sheet SDS

  • 2-Nitroimidazole

    Hazmat
    Purity:
    ≥ 97% (NMR)
    Synonym:
    Azomycin
    Hazmat
    Catalog Number:
    38393
    CAS Number:
    527-73-1
    Purity Limit:
    ≥ 97% (NMR)
    MDL NO:
    MFCD00005185
    Molecular Formula:
    C3H3N3O2
    Molecular Weight:
    113.08
    Specification Sheet SDS

  • 9-Oxoacridine-10-acetic acid

    Purity:
    ≥ 98% (Assay by titration, HPLC)
    Synonym:
    10-(Carboxymethyl)-9(10H)-acridone
    Catalog Number:
    38141
    CAS Number:
    38609-97-1
    Purity Limit:
    ≥ 98% (Assay by titration, HPLC)
    MDL NO:
    MFCD00157050
    Molecular Formula:
    C15H11NO3
    Molecular Weight:
    253.26
    Specification Sheet SDS

  • 2-Mercapto-1-methylimidazole

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    Methimazole
    Catalog Number:
    38029
    CAS Number:
    60-56-0
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00179321
    Molecular Formula:
    C4H6N2S
    Molecular Weight:
    114.17
    Specification Sheet SDS

  • Losartan potassium

    Grade:
    Meets USP specification
    Purity:
    98.5-101.0% (Assay, anhydrous basis)
    Synonym:
    2-Butyl-4-chloro-1-[[2'-(1H-tetrazol-5-yl)-1,1'-biphenyl-4-yl]methyl]imidazole-5-methanol potassium salt
    Catalog Number:
    37994
    Grade:
    Meets USP specification
    CAS Number:
    124750-99-8
    Purity Limit:
    98.5-101.0% (Assay, anhydrous basis)
    MDL NO:
    MFCD02092704
    Molecular Formula:
    C22H22ClKN6O
    Molecular Weight:
    461.01
    Specification Sheet SDS

  • 3-Hydroxypyrazine-2-carboxamide

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    T-1105
    Catalog Number:
    37939
    CAS Number:
    55321-99-8
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00233977
    Molecular Formula:
    C5H5N3O2
    Molecular Weight:
    139.11
    Specification Sheet SDS

  • 3-Hydroxy-1,2-dimethyl-4(1H)-pyridone

    Purity:
    ≥ 98% (Assay by Titration)
    Synonym:
    Deferiprone
    Catalog Number:
    37931
    CAS Number:
    30652-11-0
    Purity Limit:
    ≥ 98% (Assay by Titration)
    MDL NO:
    MFCD00134497
    Molecular Formula:
    C7H9NO2
    Molecular Weight:
    139.15
    Specification Sheet SDS

  • Gaboxadol hydrochloride

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    4,5,6,7-Tetrahydroisoxazolo[5,4-c]pyridin-3-ol hydrochloride
    Catalog Number:
    37915
    CAS Number:
    85118-33-8
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00055180
    Molecular Formula:
    C6H8N2O2·HCl
    Molecular Weight:
    176.6
    Specification Sheet SDS

  • Benzarone

    Purity:
    ≥ 98% (GC)
    Synonym:
    2-Ethyl-3-(4-hydroxybenzoyl)benzofuran
    Catalog Number:
    37861
    CAS Number:
    1477-19-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00867417
    Molecular Formula:
    C17H14O3
    Molecular Weight:
    266.3
    Specification Sheet SDS

  • Phenytoin sodium

    Purity:
    ≥ 98% (Assay by titration, HPLC)
    Synonym:
    Sodium 5,5-diphenylhydantoin
    Catalog Number:
    37780
    CAS Number:
    630-93-3
    Purity Limit:
    ≥ 98% (Assay by titration, HPLC)
    MDL NO:
    MFCD00069674
    Molecular Formula:
    C15H11N2NaO2
    Molecular Weight:
    274.25
    Specification Sheet SDS

  • Chlormethiazole hydrochloride

    Purity:
    ≥ 98% (Assay by titration, HPLC)
    Synonym:
    5-(2-Chloroethyl)-4-methylthiazole hydrochloride
    Catalog Number:
    37743
    CAS Number:
    6001-74-7
    Purity Limit:
    ≥ 98% (Assay by titration, HPLC)
    MDL NO:
    MFCD00673948
    Molecular Formula:
    C6H8ClNS·HCl
    Molecular Weight:
    198.11
    Specification Sheet SDS

  • 2-Benzylimidazoline

    Purity:
    ≥ 97% (Assay by titration, GC)
    Synonym:
    Tolazoline
    Catalog Number:
    37653
    CAS Number:
    59-98-3
    Purity Limit:
    ≥ 97% (Assay by titration, GC)
    MDL NO:
    MFCD00005182
    Molecular Formula:
    C10H12N2
    Molecular Weight:
    160.22
    Specification Sheet SDS

  • Azathioprine

    Purity:
    ≥ 98% (Assay by titration, HPLC)
    Synonym:
    6-(1-Methyl-4-nitroimidazol-5-yl)thiopurine
    Catalog Number:
    37565
    CAS Number:
    446-86-6
    Purity Limit:
    ≥ 98% (Assay by titration, HPLC)
    MDL NO:
    MFCD00069203
    Molecular Formula:
    C9H7N7O2S
    Molecular Weight:
    277.26
    Specification Sheet SDS

  • 2-Acetamido-5-nitrothiazole

    Purity:
    ≥ 98% (Assay by titration, HPLC)
    Catalog Number:
    37558
    CAS Number:
    140-40-9
    Purity Limit:
    ≥ 98% (Assay by titration, HPLC)
    MDL NO:
    MFCD00022438
    Molecular Formula:
    C5H5N3O3S
    Molecular Weight:
    187.17
    Specification Sheet SDS

  • 4-Azidocoumarin

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    37495
    CAS Number:
    42373-56-8
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00275630
    Molecular Formula:
    C9H5N3O2
    Molecular Weight:
    187.16
    Specification Sheet SDS

  • 3,6-Diphenyl-1,2,4,5-tetrazine

    Purity:
    ≥ 98% (NMR)
    Catalog Number:
    37464
    CAS Number:
    6830-78-0
    Purity Limit:
    ≥ 98% (NMR)
    MDL NO:
    MFCD00023646
    Molecular Formula:
    C14H10N4
    Molecular Weight:
    234.26
    Specification Sheet SDS

  • 2,4,6-Trichloropyridine

    Purity:
    ≥ 99% (GC)
    Catalog Number:
    37417
    CAS Number:
    16063-69-7
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00971928
    Molecular Formula:
    C5H2Cl3N
    Molecular Weight:
    182.44
    Specification Sheet SDS

  • 3,3,5,5-Tetramethyl-1-pyrroline N-oxide

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    37377
    CAS Number:
    10135-38-3
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00010542
    Molecular Formula:
    C8H15NO
    Molecular Weight:
    141.21
    Specification Sheet SDS

  • 1-(tert-Butyldimethylsilyl)imidazole

    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    TBDMSIM
    Catalog Number:
    37334
    CAS Number:
    54925-64-3
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00011682
    Molecular Formula:
    C9H18N2Si
    Molecular Weight:
    182.34
    Specification Sheet SDS

  • 4-(Trimethylsilyl)morpholine

    Hazmat
    Purity:
    ≥ 97% (GC)
    Synonym:
    N-(Trimethylsilyl)morpholine
    Hazmat
    Catalog Number:
    37340
    CAS Number:
    13368-42-8
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD00010098
    Molecular Formula:
    C7H17NOSi
    Molecular Weight:
    159.3
    Specification Sheet SDS

  • 3-(Trimethylsilyl)-2-oxazolidinone

    Purity:
    ≥ 98% (GC)
    Synonym:
    2-Oxo-3-(trimethylsilyl)-1,3-oxazolidine
    Catalog Number:
    37341
    CAS Number:
    43112-38-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00010197
    Molecular Formula:
    C6H13NO2Si
    Molecular Weight:
    159.26
    Specification Sheet SDS

  • 2-(Trimethylsilyl)-1,3-dithiane

    Purity:
    ≥ 99% (GC)
    Synonym:
    1,3-Dithian-2-yltrimethylsilane
    Catalog Number:
    37287
    CAS Number:
    13411-42-2
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00006655
    Molecular Formula:
    C7H16S2Si
    Molecular Weight:
    192.41
    Specification Sheet SDS

  • 2,6-Dichloropyridine N-oxide

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    37295
    CAS Number:
    2587-00-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00130246
    Molecular Formula:
    C5H3Cl2NO
    Molecular Weight:
    163.99
    Specification Sheet SDS

  • 1,3-Diiodo-5,5-dimethylhydantoin

    Hazmat
    Purity:
    ≥ 99% (Assay by titration)
    Synonym:
    DIH
    Hazmat
    Catalog Number:
    37242
    CAS Number:
    2232-12-4
    Purity Limit:
    ≥ 99% (Assay by titration)
    MDL NO:
    MFCD00020867
    Molecular Formula:
    C5H6I2N2O2
    Molecular Weight:
    379.92
    Specification Sheet SDS

  • Rhodanine

    Purity:
    ≥ 98% (Assay by titration, GC)
    Synonym:
    2-Thioxo-4-thiazolidinone
    Catalog Number:
    37228
    CAS Number:
    141-84-4
    Purity Limit:
    ≥ 98% (Assay by titration, GC)
    MDL NO:
    MFCD00005488
    Molecular Formula:
    C3H3NOS2
    Molecular Weight:
    133.19
    Specification Sheet SDS

  • 4-Formylmorpholine

    Purity:
    ≥ 99% (GC)
    Synonym:
    4-Morpholinecarboxaldehyde
    Catalog Number:
    37218
    CAS Number:
    4394-85-8
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00006170
    Molecular Formula:
    C5H9NO2
    Molecular Weight:
    115.13
    Specification Sheet SDS

  • 1-Formylpiperidine

    Hazmat
    Purity:
    ≥ 99% (GC)
    Synonym:
    N-Carbaldehyde piperidine
    Hazmat
    Catalog Number:
    37219
    CAS Number:
    2591-86-8
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00006483
    Molecular Formula:
    C6H11NO
    Molecular Weight:
    113.16
    Specification Sheet SDS

  • 1,4,7,10-Tetraazacyclododecane tetrahydrochloride

    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    Cyclen tetrahydrochloride
    Catalog Number:
    37167
    CAS Number:
    10045-25-7
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00068484
    Molecular Formula:
    C8H20N4·4HCl
    Molecular Weight:
    318.11
    Specification Sheet SDS
Back to top