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Heterocyclic Building Blocks

3766
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  • 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

  • 4-Bromo-3-methylpyrazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44616
    CAS Number:
    13808-64-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005241
    Molecular Formula:
    C4H5BrN2
    Molecular Weight:
    161.0
    Specification Sheet SDS

  • 1-(4-Chlorophenyl)-3-methyl-5-pyrazolone

    Purity:
    ≥ 98% (Assay by titration)
    Catalog Number:
    44614
    CAS Number:
    13024-90-3
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00043814
    Molecular Formula:
    C10H9ClN2O
    Molecular Weight:
    208.65
    Specification Sheet SDS

  • 4-Iodo-1-methylpyrazole-5-carboxylic acid

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44611
    CAS Number:
    75092-30-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00461121
    Molecular Formula:
    C5H5IN2O2
    Molecular Weight:
    252.01
    Specification Sheet SDS

  • 4-Iodo-1-methylpyrazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44610
    CAS Number:
    39806-90-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD05663860
    Molecular Formula:
    C4H5IN2
    Molecular Weight:
    208.0
    Specification Sheet SDS

  • 4-Chloropyrazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44613
    CAS Number:
    15878-00-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00159634
    Molecular Formula:
    C3H3ClN2
    Molecular Weight:
    102.52
    Specification Sheet SDS

  • 4-Bromo-1,3,5-trimethylpyrazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44607
    CAS Number:
    15801-69-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00052532
    Molecular Formula:
    C6H9BrN2
    Molecular Weight:
    189.06
    Specification Sheet SDS

  • 3-Chloro-2,5-dimethylpyrazine

    Purity:
    ≥ 95% (GC)
    Catalog Number:
    44597
    CAS Number:
    95-89-6
    Purity Limit:
    ≥ 95% (GC)
    MDL NO:
    MFCD00006143
    Molecular Formula:
    C6H7ClN2
    Molecular Weight:
    142.59
    Specification Sheet SDS

  • Chloropyrazine

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    44599
    CAS Number:
    14508-49-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006124
    Molecular Formula:
    C4H3ClN2
    Molecular Weight:
    0
    Specification Sheet SDS

  • 2-Bromo-5-hydroxypyrazine

    Purity:
    ≥ 95% (GC)
    Synonym:
    5-Bromo-2(1H-pyrazinone
    Catalog Number:
    44592
    CAS Number:
    374063-92-0
    Purity Limit:
    ≥ 95% (GC)
    MDL NO:
    MFCD06245330
    Molecular Formula:
    C4H3BrN2O
    Molecular Weight:
    174.99
    Specification Sheet SDS

  • 2-Chloro-3,5-dimethylpyrazine

    Purity:
    ≥ 95% (GC)
    Catalog Number:
    44602
    CAS Number:
    38557-72-1
    Purity Limit:
    ≥ 95% (GC)
    MDL NO:
    MFCD00126945
    Molecular Formula:
    C6H7ClN2
    Molecular Weight:
    142.59
    Specification Sheet SDS

  • 2,3-Dichloropyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44604
    CAS Number:
    4858-85-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00040964
    Molecular Formula:
    C4H2Cl2N2
    Molecular Weight:
    148.97
    Specification Sheet SDS

  • 5-Chloro-2,3-diphenylpyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44590
    CAS Number:
    41270-66-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00234892
    Molecular Formula:
    C16H11ClN2
    Molecular Weight:
    266.73
    Specification Sheet SDS

  • 5-Chloro-1,3-dimethylpyrazole-4-carboxaldehyde

    Purity:
    ≥ 98% (GC)
    Synonym:
    5-Chloro-4-formyl-1,3-dimethylpyrazole
    Catalog Number:
    44605
    CAS Number:
    27006-76-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00052538
    Molecular Formula:
    C6H7ClN2O
    Molecular Weight:
    158.59
    Specification Sheet SDS

  • 2-Chloro-6-methylpyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44600
    CAS Number:
    38557-71-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00055032
    Molecular Formula:
    C5H5ClN2
    Molecular Weight:
    128.56
    Specification Sheet SDS

  • 2-Amino-6-chloropyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44595
    CAS Number:
    33332-28-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00055024
    Molecular Formula:
    C4H4ClN3
    Molecular Weight:
    129.55
    Specification Sheet SDS

  • 3-Chloropyrazine-2-carboxamide

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    44601
    CAS Number:
    21279-62-9
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD09863915
    Molecular Formula:
    C5H4ClN3O
    Molecular Weight:
    157.56
    Specification Sheet SDS

  • 2-Iodopyrazine

    Purity:
    ≥ 97% (GC)
    Synonym:
    Iodopyrazine
    Catalog Number:
    44596
    CAS Number:
    32111-21-0
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD01319019
    Molecular Formula:
    C4H3IN2
    Molecular Weight:
    205.99
    Specification Sheet SDS

  • 2-Amino-3,5-dibromopyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44598
    CAS Number:
    24241-18-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00673150
    Molecular Formula:
    C4H3Br2N3
    Molecular Weight:
    252.9
    Specification Sheet SDS

  • 4-Chloro-1-methylpiperidine hydrochloride

    Purity:
    ≥ 98% (Assay by titration)
    Catalog Number:
    44577
    CAS Number:
    5382-23-0
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00012834
    Molecular Formula:
    C6H12ClN·HCl
    Molecular Weight:
    170.08
    Specification Sheet SDS

  • 2-Bromopyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44593
    CAS Number:
    56423-63-3
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD08275680
    Molecular Formula:
    C4H3BrN2
    Molecular Weight:
    158.99
    Specification Sheet SDS

  • 4-Chlorotetrahydro-2H-pyran

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    44583
    CAS Number:
    1768-64-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00074911
    Molecular Formula:
    C5H9ClO
    Molecular Weight:
    0
    Specification Sheet SDS

  • 2-Amino-5-chloropyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44594
    CAS Number:
    33332-29-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD03423596
    Molecular Formula:
    C4H4ClN3
    Molecular Weight:
    129.55
    Specification Sheet SDS

  • 6-Chloropyrazine-2-carboxylic acid

    Purity:
    ≥ 96% (HPLC)
    Catalog Number:
    44588
    CAS Number:
    23688-89-3
    Purity Limit:
    ≥ 96% (HPLC)
    MDL NO:
    MFCD00837871
    Molecular Formula:
    C5H3ClN2O2
    Molecular Weight:
    158.54
    Specification Sheet SDS

  • 2-Amino-3-chloropyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44587
    CAS Number:
    6863-73-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD04114305
    Molecular Formula:
    C4H4ClN3
    Molecular Weight:
    129.55
    Specification Sheet SDS

  • 3-Amino-6-bromopyrazine-2-carboxamide

    Purity:
    ≥ 98%
    Catalog Number:
    44589
    CAS Number:
    17890-77-6
    Purity Limit:
    ≥ 98%
    MDL NO:
    MFCD13689185
    Molecular Formula:
    C5H5BrN4O
    Molecular Weight:
    217.03
    Specification Sheet SDS

  • 4-Chloro-1-methylpiperidine

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    44571
    CAS Number:
    5570-77-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00044489
    Molecular Formula:
    C6H12ClN
    Molecular Weight:
    0
    Specification Sheet SDS

  • 2-(3-Chloropropoxy)tetrahydro-2H-pyran

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44584
    CAS Number:
    42330-88-1
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD00023846
    Molecular Formula:
    C8H15ClO2
    Molecular Weight:
    178.66
    Specification Sheet SDS

  • 2-(2-Chloroethoxy)tetrahydro-2H-pyran

    Purity:
    ≥ 96% (GC)
    Catalog Number:
    44586
    CAS Number:
    5631-96-9
    Purity Limit:
    ≥ 96% (GC)
    MDL NO:
    MFCD00142761
    Molecular Formula:
    C7H13ClO2
    Molecular Weight:
    164.63
    Specification Sheet SDS

  • 2,6-Dibromopyrazine

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44591
    CAS Number:
    23229-25-6
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD08061601
    Molecular Formula:
    C4H2Br2N2
    Molecular Weight:
    237.88
    Specification Sheet SDS

  • 4-(4'-Bromophenyl)-4-hydroxypiperidine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44573
    CAS Number:
    57988-58-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00067034
    Molecular Formula:
    C11H14BrNO
    Molecular Weight:
    256.14
    Specification Sheet SDS
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