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Heterocyclic Building Blocks

3723
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  • 2,3-Dichloro-5-hydroxypyridine

    Purity:
    ≥ 98% (GC)
    Synonym:
    5,6-Dichloro-3-pyridinol
    Catalog Number:
    44641
    CAS Number:
    110860-92-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD09835219
    Molecular Formula:
    C5H3Cl2NO
    Molecular Weight:
    163.99
    Specification Sheet SDS

  • 3-Bromo-4-cyanopyridine

    Hazmat
    Purity:
    ≥ 96% (GC)
    Synonym:
    3-Bromo-4-pyridinecarbonitrile
    Hazmat
    Catalog Number:
    44669
    CAS Number:
    13958-98-0
    Purity Limit:
    ≥ 96% (GC)
    MDL NO:
    MFCD00234143
    Molecular Formula:
    C6H3BrN2
    Molecular Weight:
    183.01
    Specification Sheet SDS

  • 2-Iodo-5-nitropyridine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44662
    CAS Number:
    28080-54-8
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD05863241
    Molecular Formula:
    C5H3IN2O2
    Molecular Weight:
    250.0
    Specification Sheet SDS

  • 3-Chloro-5-hydroxypyridine

    Purity:
    ≥ 98% (GC)
    Synonym:
    5-Chloro-3-pyridinol
    Catalog Number:
    44664
    CAS Number:
    74115-12-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006379
    Molecular Formula:
    C5H4ClNO
    Molecular Weight:
    129.54
    Specification Sheet SDS

  • 2,4-Dibromopyridine

    Purity:
    ≥ 98.5% (GC)
    Catalog Number:
    44659
    CAS Number:
    58530-53-3
    Purity Limit:
    ≥ 98.5% (GC)
    MDL NO:
    MFCD01859720
    Molecular Formula:
    C5H3Br2N
    Molecular Weight:
    236.89
    Specification Sheet SDS

  • 4-Chloro-2-hydroxypyridine

    Purity:
    ≥ 98% (GC)
    Synonym:
    4-Chloro-2-pyridinol
    Catalog Number:
    44658
    CAS Number:
    40673-25-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD03093022
    Molecular Formula:
    C5H4ClNO
    Molecular Weight:
    129.54
    Specification Sheet SDS

  • 5-Bromo-2-hydrazinopyridine

    Purity:
    ≥ 97% (HPLC)
    Synonym:
    (5-Bromo-2-pyridyl)hydrazine
    Catalog Number:
    44663
    CAS Number:
    77992-44-0
    Purity Limit:
    ≥ 97% (HPLC)
    MDL NO:
    MFCD00513424
    Molecular Formula:
    C5H6BrN3
    Molecular Weight:
    188.03
    Specification Sheet SDS

  • 4,5-Dichloro-3(2H)-pyridazinone

    Purity:
    ≥ 98% (GC)
    Synonym:
    4,5-Dichloro-3-hydroxypyridazine
    Catalog Number:
    44629
    CAS Number:
    932-22-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00051504
    Molecular Formula:
    C4H2Cl2N2O
    Molecular Weight:
    164.97
    Specification Sheet SDS

  • 4-Iodopyridine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44655
    CAS Number:
    15854-87-2
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD02093937
    Molecular Formula:
    C5H4IN
    Molecular Weight:
    205.0
    Specification Sheet SDS

  • 2-Bromo-4-hydroxypyridine

    Purity:
    ≥ 98% (GC)
    Synonym:
    2-Bromo-4-pyridinol
    Catalog Number:
    44667
    CAS Number:
    36953-40-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00234040
    Molecular Formula:
    C5H4BrNO
    Molecular Weight:
    174.0
    Specification Sheet SDS

  • 4-Bromopyridine hydrobromide

    Hazmat
    Purity:
    ≥ 98% (Assay by titration)
    Hazmat
    Catalog Number:
    44660
    CAS Number:
    74129-11-6
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00060195
    Molecular Formula:
    C5H4BrN·HBr
    Molecular Weight:
    238.91
    Specification Sheet SDS

  • 4-Amino-3,5-dibromopyridine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44657
    CAS Number:
    84539-34-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00234048
    Molecular Formula:
    C5H4Br2N2
    Molecular Weight:
    251.91
    Specification Sheet SDS

  • 3,5-Dichloro-4-iodopyridine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44642
    CAS Number:
    343781-41-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD03094687
    Molecular Formula:
    C5H2Cl2IN
    Molecular Weight:
    273.88
    Specification Sheet SDS

  • 3-Amino-6-bromo-2-chloropyridine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44650
    CAS Number:
    169833-70-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD04971930
    Molecular Formula:
    C5H4BrClN2
    Molecular Weight:
    207.46
    Specification Sheet SDS

  • 2,3,6-Trichloropyridine

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44646
    CAS Number:
    6515-09-9
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD00463516
    Molecular Formula:
    C5H2Cl3N
    Molecular Weight:
    182.43
    Specification Sheet SDS

  • 4-Chloropyridine N-oxide

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44652
    CAS Number:
    1121-76-2
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD00047425
    Molecular Formula:
    C5H4ClNO
    Molecular Weight:
    129.54
    Specification Sheet SDS

  • 3-Amino-6-chloropyridazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44626
    CAS Number:
    5469-69-2
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00051506
    Molecular Formula:
    C4H4ClN3
    Molecular Weight:
    129.55
    Specification Sheet SDS

  • 2,6-Diiodopyridine

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44656
    CAS Number:
    53710-17-1
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD07366728
    Molecular Formula:
    C5H3I2N
    Molecular Weight:
    330.89
    Specification Sheet SDS

  • 2,6-Dibromopyridine N-oxide

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44639
    CAS Number:
    25373-69-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00234019
    Molecular Formula:
    C5H3Br2NO
    Molecular Weight:
    252.89
    Specification Sheet SDS

  • 2-Bromo-3-iodopyridine

    Purity:
    ≥ 95% (GC)
    Catalog Number:
    44645
    CAS Number:
    265981-13-3
    Purity Limit:
    ≥ 95% (GC)
    MDL NO:
    MFCD09056782
    Molecular Formula:
    C5H3BrIN
    Molecular Weight:
    283.89
    Specification Sheet SDS

  • 1,4-Dichlorophthalazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44634
    CAS Number:
    4752-10-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006909
    Molecular Formula:
    C8H4Cl2N2
    Molecular Weight:
    199.03
    Specification Sheet SDS

  • 5-Bromo-2,3-pyridinediol

    Purity:
    ≥ 98% (GC)
    Synonym:
    5-Bromo-2,3-dihydroxypyridine
    Catalog Number:
    44647
    CAS Number:
    34206-49-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD08276314
    Molecular Formula:
    C5H4BrNO2
    Molecular Weight:
    190.0
    Specification Sheet SDS

  • 6-Bromo-2-hydroxypyridine

    Purity:
    ≥ 98% (GC)
    Synonym:
    6-Bromo-2-pyridinol
    Catalog Number:
    44643
    CAS Number:
    27992-32-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00234043
    Molecular Formula:
    C5H4BrNO
    Molecular Weight:
    174.0
    Specification Sheet SDS

  • 2-Bromo-4,6-dimethylpyridine

    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    2-Bromo-4,6-lutidine
    Catalog Number:
    44644
    CAS Number:
    4926-26-5
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00082591
    Molecular Formula:
    C7H8BrN
    Molecular Weight:
    186.05
    Specification Sheet SDS

  • 2,5-Dibromo-3-nitropyridine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44640
    CAS Number:
    15862-37-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD09266223
    Molecular Formula:
    C5H2Br2N2O2
    Molecular Weight:
    281.89
    Specification Sheet SDS

  • 3,6-Dichloropyridazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44632
    CAS Number:
    141-30-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006466
    Molecular Formula:
    C4H2Cl2N2
    Molecular Weight:
    148.97
    Specification Sheet SDS

  • 4,5-Dibromo-3(2H)-pyridazinone

    Purity:
    ≥ 98% (GC)
    Synonym:
    4,5-Dibromo-3-hydroxypyridazine
    Catalog Number:
    44623
    CAS Number:
    5788-58-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00023641
    Molecular Formula:
    C4H2Br2N2O
    Molecular Weight:
    253.88
    Specification Sheet SDS

  • 2,3-Diamino-6-chloropyridine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44636
    CAS Number:
    40851-95-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00209966
    Molecular Formula:
    C5H6ClN3
    Molecular Weight:
    143.57
    Specification Sheet SDS

  • 5-Chloro-3-methyl-1-phenyl-1H-pyrazole-4-carboxaldehyde

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44619
    CAS Number:
    947-95-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00100755
    Molecular Formula:
    C11H9ClN2O
    Molecular Weight:
    220.66
    Specification Sheet SDS

  • 1-Benzyl-4-iodo-1H-pyrazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44617
    CAS Number:
    50877-42-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD04038745
    Molecular Formula:
    C10H9IN2
    Molecular Weight:
    284.1
    Specification Sheet SDS

  • 2,6-Dibromo-3-hydroxypyridine

    Purity:
    ≥ 97% (Assay by titration)
    Synonym:
    2,6-Dibromo-3-pyridinol
    Catalog Number:
    44637
    CAS Number:
    6602-33-1
    Purity Limit:
    ≥ 97% (Assay by titration)
    MDL NO:
    MFCD01318479
    Molecular Formula:
    C5H3Br2NO
    Molecular Weight:
    252.89
    Specification Sheet SDS

  • 2,3-Dibromo-5-chloropyridine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44638
    CAS Number:
    137628-17-2
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD08687254
    Molecular Formula:
    C5H2Br2ClN
    Molecular Weight:
    271.34
    Specification Sheet SDS

  • 3-Bromoimidazo[1,2-b]pyridazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44630
    CAS Number:
    18087-73-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD09757672
    Molecular Formula:
    C6H4BrN3
    Molecular Weight:
    198.02
    Specification Sheet SDS

  • Methyl 3-amino-6-bromopyrazine-2-carboxylate

    Purity:
    ≥ 98% (GC)
    Synonym:
    3-Amino-6-bromopyrazine-2-carboxylic acid methyl ester
    Catalog Number:
    44631
    CAS Number:
    6966-01-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00834964
    Molecular Formula:
    C6H6BrN3O2
    Molecular Weight:
    232.04
    Specification Sheet SDS

  • 3-Amino-4-bromo-5-methylpyrazole

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    44618
    CAS Number:
    1780-72-9
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD03412169
    Molecular Formula:
    C4H6BrN3
    Molecular Weight:
    176.02
    Specification Sheet SDS

  • 3,6-Dichloro-4-methylpyridazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44633
    CAS Number:
    19064-64-3
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006465
    Molecular Formula:
    C5H4Cl2N2
    Molecular Weight:
    163.0
    Specification Sheet SDS

  • 4-Chloro-3-ethyl-1-methyl-1H-pyrazole-5-carboxylic acid

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44615
    CAS Number:
    127892-62-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD08459057
    Molecular Formula:
    C7H9ClN2O2
    Molecular Weight:
    188.61
    Specification Sheet SDS

  • 4-Chloro-5-methoxy-3(2H)-pyridazinone

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44628
    CAS Number:
    63910-43-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD04971392
    Molecular Formula:
    C5H5ClN2O2
    Molecular Weight:
    160.56
    Specification Sheet SDS

  • 4,5-Dichloro-2-phenyl-3(2H)-pyridazinone

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44622
    CAS Number:
    1698-53-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006470
    Molecular Formula:
    C10H6Cl2N2O
    Molecular Weight:
    241.07
    Specification Sheet SDS

  • 3-Chloro-6-phenylpyridazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44624
    CAS Number:
    20375-65-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00075253
    Molecular Formula:
    C10H7ClN2
    Molecular Weight:
    190.63
    Specification Sheet SDS

  • 6-Chloro-2-iodo-3-hydroxypyridine

    Purity:
    ≥ 98% (GC)
    Synonym:
    6-Chloro-2-iodo-3-pyridinol
    Catalog Number:
    44635
    CAS Number:
    188057-26-3
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD07636749
    Molecular Formula:
    C5H3ClINO
    Molecular Weight:
    255.44
    Specification Sheet SDS

  • 4,5-Dichloro-2-methyl-3(2H)-pyridazinone

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44625
    CAS Number:
    933-76-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00051686
    Molecular Formula:
    C5H4Cl2N2O
    Molecular Weight:
    179.0
    Specification Sheet SDS

  • Methyl 3,5-diamino-6-chloropyrazine-2-carboxylate

    Purity:
    ≥ 98% (GC)
    Synonym:
    3,5-Diamino-6-chloropyrazine-2-carboxylic acid methyl ester
    Catalog Number:
    44621
    CAS Number:
    1458-01-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD01928388
    Molecular Formula:
    C6H7ClN4O2
    Molecular Weight:
    202.6
    Specification Sheet SDS

  • 3-Chloro-6-methoxypyridazine

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44627
    CAS Number:
    1722-10-7
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD00006467
    Molecular Formula:
    C5H5ClN2O
    Molecular Weight:
    144.56
    Specification Sheet SDS

  • 3-Chloro-6-methylpyridazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44620
    CAS Number:
    1121-79-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00052905
    Molecular Formula:
    C5H5ClN2
    Molecular Weight:
    128.56
    Specification Sheet SDS

  • 4-Bromoantipyrine

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    44612
    CAS Number:
    5426-65-3
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00020779
    Molecular Formula:
    C11H11BrN2O
    Molecular Weight:
    267.13
    Specification Sheet SDS

  • 5-Iodo-1-methylpyrazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44608
    CAS Number:
    34091-51-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD11109327
    Molecular Formula:
    C4H5IN2
    Molecular Weight:
    208.0
    Specification Sheet SDS

  • 4-Bromo-1-ethylpyrazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44606
    CAS Number:
    71229-85-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD08235252
    Molecular Formula:
    C5H7BrN2
    Molecular Weight:
    175.03
    Specification Sheet SDS

  • 5-Chloropyrazine-2-carboxylic acid

    Purity:
    ≥ 98% (Assay by titration)
    Catalog Number:
    44603
    CAS Number:
    36070-80-1
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD09033269
    Molecular Formula:
    C5H3ClN2O2
    Molecular Weight:
    158.54
    Specification Sheet SDS

  • 4-Iodo-3,5-dimethylpyrazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44609
    CAS Number:
    2033-45-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00040247
    Molecular Formula:
    C5H7IN2
    Molecular Weight:
    222.03
    Specification Sheet SDS
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