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Heterocyclic Building Blocks

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  • Piperazine phosphate monohydrate

    Purity:
    ≥ 98% (Assay by titration)
    Catalog Number:
    43363
    CAS Number:
    18534-18-4
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00036382
    Molecular Formula:
    C4H10N2·H3PO4·H2O
    Molecular Weight:
    202.15
    Specification Sheet SDS

  • 1-(tert-Butoxycarbonyl)-3-(hydroxymethyl)piperazine

    Purity:
    ≥ 98% (GC)
    Synonym:
    1-Boc-3-(hydroxymethyl)piperazine
    Catalog Number:
    43369
    CAS Number:
    301673-16-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD04115304
    Molecular Formula:
    C10H20N2O3
    Molecular Weight:
    216.28
    Specification Sheet SDS

  • 1-(2-Pyrimidyl)piperazine

    Purity:
    ≥ 98% (GC)
    Synonym:
    2-(1-Piperazinyl)pyrimidine
    Catalog Number:
    43364
    CAS Number:
    20980-22-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00040742
    Molecular Formula:
    C8H12N4
    Molecular Weight:
    164.21
    Specification Sheet SDS

  • Piperazine sulfate hydrate

    Purity:
    ≥ 95%
    Catalog Number:
    43365
    CAS Number:
    4554-26-1
    Purity Limit:
    ≥ 95%
    MDL NO:
    MFCD00060186
    Molecular Formula:
    C4H10N2·H2SO4·xH2O
    Molecular Weight:
    184.21
    Specification Sheet SDS

  • 1-Allylpiperazine

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    43354
    CAS Number:
    13961-36-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00167970
    Molecular Formula:
    C7H14N2
    Molecular Weight:
    126.2
    Specification Sheet SDS

  • tert-Butyl 3-oxopiperazine-1-carboxylate

    Purity:
    ≥ 98% (GC)
    Synonym:
    1-Boc-3-oxopiperazine
    Catalog Number:
    43347
    CAS Number:
    76003-29-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD02181069
    Molecular Formula:
    C9H16N2O3
    Molecular Weight:
    200.24
    Specification Sheet SDS

  • trans-2,5-Dimethylpiperazine

    Hazmat
    Purity:
    ≥ 99% (GC)
    Hazmat
    Catalog Number:
    43356
    CAS Number:
    2815-34-1
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00070516
    Molecular Formula:
    C6H14N2
    Molecular Weight:
    114.19
    Specification Sheet SDS

  • 1-(2-Furoyl)piperazine hydrochloride

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    1-[(2-Furan)carbonyl]piperazine hydrochloride
    Catalog Number:
    43360
    CAS Number:
    60548-09-6
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00236012
    Molecular Formula:
    C9H12N2O2·HCl
    Molecular Weight:
    216.67
    Specification Sheet SDS

  • 1-(2-Propynyl)piperazine

    Purity:
    ≥ 98% (GC)
    Synonym:
    1-Propargylpiperazine
    Catalog Number:
    43355
    CAS Number:
    52070-67-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD08445213
    Molecular Formula:
    C7H12N2
    Molecular Weight:
    124.19
    Specification Sheet SDS

  • 1,4-Diformylpiperazine

    Purity:
    ≥ 98% (GC)
    Synonym:
    1,4-Piperazinedicarboxaldehyde
    Catalog Number:
    43346
    CAS Number:
    4164-39-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006153
    Molecular Formula:
    C6H10N2O2
    Molecular Weight:
    142.16
    Specification Sheet SDS

  • 1-(4-Bromobenzyl)-4-methylpiperazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43350
    CAS Number:
    368879-17-8
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00811183
    Molecular Formula:
    C12H17BrN2
    Molecular Weight:
    269.19
    Specification Sheet SDS

  • 1,4-Bis(2-hydroxyethyl)piperazine

    Purity:
    ≥ 98% (GC)
    Synonym:
    1,4-Piperazinediethanol
    Catalog Number:
    43349
    CAS Number:
    122-96-3
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006157
    Molecular Formula:
    C8H18N2O2
    Molecular Weight:
    174.24
    Specification Sheet SDS

  • 1-Piperonylpiperazine

    Purity:
    ≥ 97% (Assay by titration)
    Synonym:
    1-[(1,3-Benzodioxol-5-yl)methyl]piperazine
    Catalog Number:
    43334
    CAS Number:
    32231-06-4
    Purity Limit:
    ≥ 97% (Assay by titration)
    MDL NO:
    MFCD00005834
    Molecular Formula:
    C12H16N2O2
    Molecular Weight:
    220.27
    Specification Sheet SDS

  • 1,4-Bis(3-isocyanopropyl)piperazine

    Purity:
    ≥ 97% (HPLC)
    Catalog Number:
    43352
    CAS Number:
    51641-96-4
    Purity Limit:
    ≥ 97% (HPLC)
    MDL NO:
    MFCD06200487
    Molecular Formula:
    C12H20N4
    Molecular Weight:
    220.32
    Specification Sheet SDS

  • 1-Benzoylpiperazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43351
    CAS Number:
    13754-38-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00810192
    Molecular Formula:
    C11H14N2O
    Molecular Weight:
    190.25
    Specification Sheet SDS

  • Benzyl 3-oxopiperazine-1-carboxylate

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    1-Cbz-3-oxopiperazine
    Catalog Number:
    43348
    CAS Number:
    78818-15-2
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00173924
    Molecular Formula:
    C12H14N2O3
    Molecular Weight:
    234.26
    Specification Sheet SDS

  • 1-Cyclopropylpiperazine

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    43344
    CAS Number:
    20327-23-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD06254805
    Molecular Formula:
    C7H14N2
    Molecular Weight:
    126.2
    Specification Sheet SDS

  • 1-(2-Ethoxyphenyl)piperazine hydrochloride

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    43345
    CAS Number:
    83081-75-8
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00012763
    Molecular Formula:
    C12H18N2O·HCl
    Molecular Weight:
    242.75
    Specification Sheet SDS

  • 1-[4-(4-Amino-3-methoxyphenyl)piperazin-1-yl]ethanone

    Purity:
    ≥ 96% (HPLC)
    Catalog Number:
    43330
    CAS Number:
    1021426-42-5
    Purity Limit:
    ≥ 96% (HPLC)
    MDL NO:
    MFCD19174778
    Molecular Formula:
    C13H19N3O2
    Molecular Weight:
    249.31
    Specification Sheet SDS

  • 1-(4-Nitrophenyl)piperazine

    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    1-Nitro-4-(1-piperazinyl)benzene
    Catalog Number:
    43326
    CAS Number:
    6269-89-2
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00005961
    Molecular Formula:
    C10H13N3O2
    Molecular Weight:
    207.23
    Specification Sheet SDS

  • 1,4-Bis(3-aminopropyl)piperazine

    Hazmat
    Purity:
    ≥ 98% (GC)
    Synonym:
    1,4-Di(3-aminopropyl)piperazine
    Hazmat
    Catalog Number:
    43341
    CAS Number:
    7209-38-3
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006161
    Molecular Formula:
    C10H24N4
    Molecular Weight:
    200.33
    Specification Sheet SDS

  • Diethylcarbamazine citrate

    Hazmat
    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    N,N-Diethyl-4-methyl-1-piperazinecarboxamide citrate
    Hazmat
    Catalog Number:
    43337
    CAS Number:
    1642-54-2
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00039124
    Molecular Formula:
    C10H21N3O·C6H8O7
    Molecular Weight:
    391.42
    Specification Sheet SDS

  • 1-Butylpiperazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43340
    CAS Number:
    5610-49-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00039702
    Molecular Formula:
    C8H18N2
    Molecular Weight:
    142.25
    Specification Sheet SDS

  • 2-Piperazinone

    Purity:
    ≥ 98% (GC)
    Synonym:
    Piperazin-2-one
    Catalog Number:
    43338
    CAS Number:
    5625-67-2
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD01318687
    Molecular Formula:
    C4H8N2O
    Molecular Weight:
    100.12
    Specification Sheet SDS

  • Piperazine hexahydrate

    Hazmat
    Purity:
    ≥ 98% (GC)
    Synonym:
    Diethylenediamine hexahydrate
    Hazmat
    Catalog Number:
    43336
    CAS Number:
    142-63-2
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00149389
    Molecular Formula:
    C4H10N2·6H2O
    Molecular Weight:
    194.23
    Specification Sheet SDS

  • 1-Ethyl-2,3-dioxopiperazine

    Purity:
    ≥ 98% (GC)
    Synonym:
    1-Ethyl-2,3-diketopiperazine
    Catalog Number:
    43342
    CAS Number:
    59702-31-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00051825
    Molecular Formula:
    C6H10N2O2
    Molecular Weight:
    142.16
    Specification Sheet SDS

  • tert-Butyl 4-(6-amino-3-pyridyl)piperazine-1-carboxylate

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    4-(6-Amino-3-pyridyl)piperazine-1-carboxylic acid tert-butyl ester
    Catalog Number:
    43339
    CAS Number:
    571188-59-5
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD11594962
    Molecular Formula:
    C14H22N4O2
    Molecular Weight:
    278.36
    Specification Sheet SDS

  • Ethyl 4-(1-piperazinyl)benzoate

    Purity:
    ≥ 98% (GC)
    Synonym:
    4-(1-Piperazinyl)benzoic acid ethyl ester
    Catalog Number:
    43332
    CAS Number:
    80518-57-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD04973340
    Molecular Formula:
    C13H18N2O2
    Molecular Weight:
    234.3
    Specification Sheet SDS

  • 3-Oxetanyl p-toluenesulfonate

    Purity:
    ≥ 98% (GC)
    Synonym:
    p-Toluenesulfonic acid 3-oxetanyl ester
    Catalog Number:
    43320
    CAS Number:
    26272-83-3
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD08544401
    Molecular Formula:
    C10H12O4S
    Molecular Weight:
    228.26
    Specification Sheet SDS

  • 3-[(Allyloxy)methyl]-3-ethyloxetane

    Hazmat
    Purity:
    ≥ 97% (GC)
    Synonym:
    3-Ethyl-3-(prop-2-enoxymethyl)oxetane
    Hazmat
    Catalog Number:
    43325
    CAS Number:
    3207-04-3
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD17012910
    Molecular Formula:
    C9H16O2
    Molecular Weight:
    156.23
    Specification Sheet SDS

  • 1-Amino-4-methylpiperazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43335
    CAS Number:
    6928-85-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006154
    Molecular Formula:
    C5H13N3
    Molecular Weight:
    115.18
    Specification Sheet SDS

  • 3-Methyl-3-oxetanecarboxylic acid

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43324
    CAS Number:
    28562-68-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD09842435
    Molecular Formula:
    C5H8O3
    Molecular Weight:
    116.12
    Specification Sheet SDS

  • 3-Amino-3-methyloxetane

    Purity:
    ≥ 97% (GC)
    Synonym:
    3-Methyl-3-oxetanamine
    Catalog Number:
    43322
    CAS Number:
    874473-14-0
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD11111713
    Molecular Formula:
    C4H9NO
    Molecular Weight:
    87.12
    Specification Sheet SDS

  • 2-Hydroxymethyloxetane

    Purity:
    ≥ 95% (GC)
    Synonym:
    2,4-Epoxybutanol
    Catalog Number:
    43321
    CAS Number:
    61266-70-4
    Purity Limit:
    ≥ 95% (GC)
    MDL NO:
    MFCD00142933
    Molecular Formula:
    C4H8O2
    Molecular Weight:
    88.11
    Specification Sheet SDS

  • 2-(4-Methyl-1-piperazinyl)aniline

    Hazmat
    Purity:
    ≥ 98% (GC)
    Synonym:
    1-(2-Aminophenyl)-4-methylpiperazine
    Hazmat
    Catalog Number:
    43333
    CAS Number:
    180605-36-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD04035359
    Molecular Formula:
    C11H17N3
    Molecular Weight:
    191.28
    Specification Sheet SDS

  • 1-Isopropylpiperazine

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    43331
    CAS Number:
    4318-42-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00167971
    Molecular Formula:
    C7H16N2
    Molecular Weight:
    128.22
    Specification Sheet SDS

  • (3-Ethyloxetan-3-yl)methyl methacrylate (stabilized with MEHQ)

    Purity:
    ≥ 98% (GC)
    Synonym:
    Methacrylic acid (3-ethyloxetan-3-yl)methyl ester (stabilized with MEHQ)
    Catalog Number:
    43323
    CAS Number:
    37674-57-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD16039335
    Molecular Formula:
    C10H16O3
    Molecular Weight:
    184.24
    Specification Sheet SDS

  • 2-Oxa-7-azaspiro[3.5]nonane hemioxalate

    Purity:
    ≥ 97% (Assay by titration)
    Catalog Number:
    43319
    CAS Number:
    1429056-28-9
    Purity Limit:
    ≥ 97% (Assay by titration)
    MDL NO:
    MFCD22422281
    Molecular Formula:
    C7H13NO·0.5C2H2O4
    Molecular Weight:
    172.2
    Specification Sheet SDS

  • 2-Methyl-2-oxazoline

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    43315
    CAS Number:
    1120-64-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005298
    Molecular Formula:
    C4H7NO
    Molecular Weight:
    85.11
    Specification Sheet SDS

  • 2-Amino-2-oxazoline hydrochloride

    Purity:
    ≥ 98% (Assay by titration)
    Catalog Number:
    43305
    CAS Number:
    375855-07-5
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00060178
    Molecular Formula:
    C3H6N2O·HCl
    Molecular Weight:
    122.55
    Specification Sheet SDS

  • 1-(4-Aminophenyl)-4-(4-methoxyphenyl)piperazine

    Purity:
    ≥ 96% (HPLC)
    Synonym:
    4-[4-(4-Methoxyphenyl)-1-piperazinyl]aniline
    Catalog Number:
    43328
    CAS Number:
    74852-62-3
    Purity Limit:
    ≥ 96% (HPLC)
    MDL NO:
    MFCD02071496
    Molecular Formula:
    C17H21N3O
    Molecular Weight:
    283.38
    Specification Sheet SDS

  • 2-Methylpiperazine

    Hazmat
    Purity:
    ≥ 99% (GC)
    Hazmat
    Catalog Number:
    43327
    CAS Number:
    109-07-9
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00005954
    Molecular Formula:
    C5H12N2
    Molecular Weight:
    100.17
    Specification Sheet SDS

  • 4,4-Dimethyl-2-oxazoline

    Hazmat
    Purity:
    ≥ 97% (GC)
    Hazmat
    Catalog Number:
    43312
    CAS Number:
    30093-99-3
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD00014507
    Molecular Formula:
    C5H9NO
    Molecular Weight:
    99.13
    Specification Sheet SDS

  • 1-(2-Pyrimidyl)piperazine dihydrochloride

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    2-(1-Piperazinyl)pyrimidine dihydrochloride
    Catalog Number:
    43329
    CAS Number:
    94021-22-4
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00012779
    Molecular Formula:
    C8H12N4·2HCl
    Molecular Weight:
    237.13
    Specification Sheet SDS

  • Oxazolo[4,5-b]pyridin-2(3H)-one

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43318
    CAS Number:
    60832-72-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00204215
    Molecular Formula:
    C6H4N2O2
    Molecular Weight:
    136.11
    Specification Sheet SDS

  • 2-Methylbenzoxazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43303
    CAS Number:
    95-21-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005771
    Molecular Formula:
    C8H7NO
    Molecular Weight:
    133.15
    Specification Sheet SDS

  • 3-Methyl-2-oxazolidone

    Purity:
    ≥ 99% (GC)
    Synonym:
    2-Oxo-3-methyloxazolidine
    Catalog Number:
    43314
    CAS Number:
    19836-78-3
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00009759
    Molecular Formula:
    C4H7NO2
    Molecular Weight:
    101.11
    Specification Sheet SDS

  • 2,4,5-Trimethyloxazole

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    43301
    CAS Number:
    20662-84-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005308
    Molecular Formula:
    C6H9NO
    Molecular Weight:
    111.14
    Specification Sheet SDS

  • 2,4,4-Trimethyl-2-oxazoline

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    43310
    CAS Number:
    1772-43-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005301
    Molecular Formula:
    C6H11NO
    Molecular Weight:
    113.16
    Specification Sheet SDS

  • 6-Chloro-2-benzoxazolinone

    Purity:
    ≥ 98% (GC)
    Synonym:
    6-Chloro-2-hydroxybenzoxazole
    Catalog Number:
    43297
    CAS Number:
    19932-84-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00463914
    Molecular Formula:
    C7H4ClNO2
    Molecular Weight:
    169.56
    Specification Sheet SDS
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