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Building Blocks

8717
Sub Categories
Fluorinated Building Blocks 1834
Heterocyclic Building Blocks 3772
Non-Heterocyclic Building Blocks 3171
Filters

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

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

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

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

  • 4-Iodo-1-methylpyrazole

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

  • 4-Chloropyrazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44613
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    15878-00-9
    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
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    15801-69-1
    MDL NO:
    MFCD00052532
    Molecular Formula:
    C6H9BrN2
    Molecular Weight:
    189.06
    Specification Sheet SDS

  • Chloropyrazine

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    44599
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    14508-49-7
    MDL NO:
    MFCD00006124
    Molecular Formula:
    C4H3ClN2
    Molecular Weight:
    114.53
    Specification Sheet SDS

  • 3-Chloro-2,5-dimethylpyrazine

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

  • 2-Bromo-5-hydroxypyrazine

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

  • 2,3-Dichloropyrazine

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

  • 2-Chloro-3,5-dimethylpyrazine

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

  • 5-Chloro-2,3-diphenylpyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44590
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    41270-66-0
    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
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    27006-76-4
    MDL NO:
    MFCD00052538
    Molecular Formula:
    C6H7ClN2O
    Molecular Weight:
    158.59
    Specification Sheet SDS

  • 2-Amino-6-chloropyrazine

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

  • 2-Chloro-6-methylpyrazine

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

  • 3-Chloropyrazine-2-carboxamide

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

  • 2-Iodopyrazine

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

  • 2-Amino-3,5-dibromopyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44598
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    24241-18-7
    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
    Purity Limit:
    ≥ 98% (Assay by titration)
    CAS Number:
    5382-23-0
    MDL NO:
    MFCD00012834
    Molecular Formula:
    C6H12ClN·HCl
    Molecular Weight:
    170.08
    Specification Sheet SDS

  • 2-Bromopyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44593
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    56423-63-3
    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
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    1768-64-5
    MDL NO:
    MFCD00074911
    Molecular Formula:
    C5H9ClO
    Molecular Weight:
    120.58
    Specification Sheet SDS

  • 2-Amino-5-chloropyrazine

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

  • 6-Chloropyrazine-2-carboxylic acid

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

  • 2-Amino-3-chloropyrazine

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

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

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

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

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44584
    Purity Limit:
    ≥ 97% (GC)
    CAS Number:
    42330-88-1
    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
    Purity Limit:
    ≥ 96% (GC)
    CAS Number:
    5631-96-9
    MDL NO:
    MFCD00142761
    Molecular Formula:
    C7H13ClO2
    Molecular Weight:
    164.63
    Specification Sheet SDS

  • 4-Chloro-1-methylpiperidine

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    44571
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    5570-77-4
    MDL NO:
    MFCD00044489
    Molecular Formula:
    C6H12ClN
    Molecular Weight:
    133.62
    Specification Sheet SDS

  • 2,6-Dibromopyrazine

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

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

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

  • 2-(2-Bromoethoxy)tetrahydro-2H-pyran (stabilized with K2CO3)

    Purity:
    ≥ 95% (GC)
    Catalog Number:
    44585
    Purity Limit:
    ≥ 95% (GC)
    CAS Number:
    17739-45-6
    MDL NO:
    MFCD01321310
    Molecular Formula:
    C7H13BrO2
    Molecular Weight:
    209.08
    Specification Sheet SDS

  • 2-Chloroadenine

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    6-Amino-2-chloropurine
    Catalog Number:
    44579
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    1839-18-5
    MDL NO:
    MFCD00037925
    Molecular Formula:
    C5H4ClN5
    Molecular Weight:
    169.57
    Specification Sheet SDS

  • 4-Bromopiperidine hydrobromide

    Purity:
    ≥ 98% (Assay by titration)
    Catalog Number:
    44574
    Purity Limit:
    ≥ 98% (Assay by titration)
    CAS Number:
    54288-70-9
    MDL NO:
    MFCD00191858
    Molecular Formula:
    C5H10BrN·HBr
    Molecular Weight:
    244.96
    Specification Sheet SDS

  • 2-(4-Chlorobutoxy)tetrahydropyran

    Purity:
    ≥ 95% (GC)
    Catalog Number:
    44582
    Purity Limit:
    ≥ 95% (GC)
    CAS Number:
    41302-05-0
    MDL NO:
    MFCD00142812
    Molecular Formula:
    C9H17ClO2
    Molecular Weight:
    192.68
    Specification Sheet SDS

  • 6-Chloro-7-iodo-7-deazapurine

    Purity:
    ≥ 95% (Assay by titration)
    Synonym:
    4-Chloro-5-iodo-7H-pyrrolo[2,3-d]pyrimidine
    Catalog Number:
    44581
    Purity Limit:
    ≥ 95% (Assay by titration)
    CAS Number:
    123148-78-7
    MDL NO:
    MFCD09263258
    Molecular Formula:
    C6H3ClIN3
    Molecular Weight:
    279.47
    Specification Sheet SDS

  • 2-Amino-6-iodopurine

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    44578
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    19690-23-4
    MDL NO:
    MFCD03840496
    Molecular Formula:
    C5H4IN5
    Molecular Weight:
    261.03
    Specification Sheet SDS

  • 1-(2-Chlorophenyl)piperazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44561
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    39512-50-0
    MDL NO:
    MFCD00040727
    Molecular Formula:
    C10H13ClN2
    Molecular Weight:
    196.68
    Specification Sheet SDS

  • 1-(3-Chloropropyl)piperidine hydrochloride

    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    3-Piperidinopropyl chloride hydrochloride
    Catalog Number:
    44576
    Purity Limit:
    ≥ 98% (Assay by titration)
    CAS Number:
    5472-49-1
    MDL NO:
    MFCD00012838
    Molecular Formula:
    C8H16ClN·HCl
    Molecular Weight:
    198.13
    Specification Sheet SDS

  • 8-Chloro-1-(3-chloropropyl)theobromine

    Purity:
    ≥ 95% (HPLC)
    Synonym:
    8-Chloro-1-(3-chloropropyl)-3,7-dimethyl-1H-purine-2,6(3H,7H-dione
    Catalog Number:
    44580
    Purity Limit:
    ≥ 95% (HPLC)
    Molecular Formula:
    C10H12Cl2N4O2
    Molecular Weight:
    291.13
    Specification Sheet SDS

  • 1-(4-Bromophenyl)piperidine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44569
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    22148-20-5
    MDL NO:
    MFCD04112533
    Molecular Formula:
    C11H14BrN
    Molecular Weight:
    240.14
    Specification Sheet SDS

  • Ethyl 4-Chloro-1-piperidinecarboxylate

    Purity:
    ≥ 98% (GC)
    Synonym:
    4-Chloro-1-piperidinecarboxylic acid ethyl ester
    Catalog Number:
    44570
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    152820-13-8
    MDL NO:
    MFCD09038524
    Molecular Formula:
    C8H14ClNO2
    Molecular Weight:
    191.66
    Specification Sheet SDS

  • 4-Chloropiperidine

    Hazmat
    Purity:
    ≥ 97% (GC)
    Hazmat
    Catalog Number:
    44572
    Purity Limit:
    ≥ 97% (GC)
    CAS Number:
    5382-18-3
    MDL NO:
    MFCD09997828
    Molecular Formula:
    C5H10ClN
    Molecular Weight:
    119.59
    Specification Sheet SDS

  • 4-(4-Chlorophenyl)-4-hydroxypiperidine

    Purity:
    ≥ 97% (HPLC)
    Synonym:
    4-(4-Chlorophenyl)-4-piperidinol
    Catalog Number:
    44567
    Purity Limit:
    ≥ 97% (HPLC)
    CAS Number:
    39512-49-7
    MDL NO:
    MFCD00006001
    Molecular Formula:
    C11H14ClNO
    Molecular Weight:
    211.69
    Specification Sheet SDS

  • 3-Bromooxetane

    Hazmat
    Purity:
    ≥ 95% (GC)
    Synonym:
    2-Bromo-1,3-epoxypropane
    Hazmat
    Catalog Number:
    44560
    Purity Limit:
    ≥ 95% (GC)
    CAS Number:
    39267-79-3
    MDL NO:
    MFCD08544402
    Molecular Formula:
    C3H5BrO
    Molecular Weight:
    136.98
    Specification Sheet SDS

  • tert-Butyl 4-(4-Bromopyrazol-1-yl)piperidine-1-carboxylate

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    4-(4-Bromopyrazol-1-yl)piperidine-1-carboxylic acidtert-butyl ester
    Catalog Number:
    44568
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    877399-50-3
    MDL NO:
    MFCD09831980
    Molecular Formula:
    C13H20BrN3O2
    Molecular Weight:
    330.23
    Specification Sheet SDS

  • 4-(4-Chlorophenyl)piperidine

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44575
    Purity Limit:
    ≥ 97% (GC)
    CAS Number:
    26905-02-2
    MDL NO:
    MFCD03077010
    Molecular Formula:
    C11H14ClN
    Molecular Weight:
    195.69
    Specification Sheet SDS

  • 1-(4-Chlorobenzyl)piperazine

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    44564
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    23145-88-2
    MDL NO:
    MFCD00040791
    Molecular Formula:
    C11H15ClN2
    Molecular Weight:
    210.71
    Specification Sheet SDS

  • 1-(3,4-Dichlorophenyl)piperazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44563
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    57260-67-0
    MDL NO:
    MFCD00023128
    Molecular Formula:
    C10H12Cl2N2
    Molecular Weight:
    231.12
    Specification Sheet SDS

  • 4-(4,6-Dichloro-2-pyrimidyl)morpholine

    Purity:
    ≥ 98% (GC)
    Synonym:
    2-(4-Morpholino)-4,6-dichloropyrimidine
    Catalog Number:
    44546
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    10397-13-4
    MDL NO:
    MFCD05022359
    Molecular Formula:
    C8H9Cl2N3O
    Molecular Weight:
    234.08
    Specification Sheet SDS

  • 4-Chloro-2,1,3-benzoxadiazole

    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    4-Chlorobenzofurazan
    Catalog Number:
    44553
    Purity Limit:
    ≥ 98% (Assay by titration)
    CAS Number:
    7116-16-7
    MDL NO:
    MFCD00191329
    Molecular Formula:
    C6H3ClN2O
    Molecular Weight:
    154.55
    Specification Sheet SDS

  • 1-(4-Chlorophenyl)piperazine hydrochloride

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    44566
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    13078-12-1
    MDL NO:
    MFCD00060187
    Molecular Formula:
    C10H13ClN2·HCl
    Molecular Weight:
    233.14
    Specification Sheet SDS
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