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Heterocyclic Building Blocks

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  • 1-(2,5-Dichloro-4-sulfophenyl)-3-methyl-5-pyrazolone monohydrate

    Purity:
    ≥ 98% (Assay by titration)
    Catalog Number:
    43255
    CAS Number:
    84-57-1
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00035706
    Molecular Formula:
    C10H8Cl2N2O4S·H2O
    Molecular Weight:
    341.16
    Specification Sheet SDS

  • 1-(3,4-Dimethylphenyl)-3-methyl-5-pyrazolone

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    43262
    CAS Number:
    277299-70-4
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD09795980
    Molecular Formula:
    C12H14N2O
    Molecular Weight:
    202.26
    Specification Sheet SDS

  • 1-Methoxyphenazine

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    43254
    CAS Number:
    2876-17-7
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD01794656
    Molecular Formula:
    C13H10N2O
    Molecular Weight:
    210.24
    Specification Sheet SDS

  • 1,3,2-Dioxathiane 2,2-dioxide

    Purity:
    ≥ 98% (GC)
    Synonym:
    1,3-Propylene sulfate
    Catalog Number:
    43261
    CAS Number:
    1073-05-8
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00801144
    Molecular Formula:
    C3H6O4S
    Molecular Weight:
    138.14
    Specification Sheet SDS

  • 2,6-Di-tert-butyl-4-methylpyrylium trifluoromethanesulfonate

    Purity:
    ≥ 97% (Assay by titration)
    Synonym:
    2,6-Di-tert-butyl-4-methylpyrylium triflate
    Catalog Number:
    43259
    CAS Number:
    59643-43-5
    Purity Limit:
    ≥ 97% (Assay by titration)
    MDL NO:
    MFCD00229854
    Molecular Formula:
    C15H23F3O4S
    Molecular Weight:
    356.4
    Specification Sheet SDS

  • 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    Acid captor H
    Catalog Number:
    43257
    CAS Number:
    5439-14-5
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00042798
    Molecular Formula:
    C8H8N2O
    Molecular Weight:
    148.17
    Specification Sheet SDS

  • 1,3,4,6-Tetrathiapentalene-2,5-dione

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    43249
    CAS Number:
    64394-45-2
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00010403
    Molecular Formula:
    C4O2S4
    Molecular Weight:
    208.28
    Specification Sheet SDS

  • 2,4,6-Triphenylpyrylium hydrogensulfate

    Hazmat
    Purity:
    ≥ 97% (HPLC)
    Hazmat
    Catalog Number:
    43258
    CAS Number:
    51071-75-1
    Purity Limit:
    ≥ 97% (HPLC)
    MDL NO:
    MFCD00012002
    Molecular Formula:
    C23H18O5S
    Molecular Weight:
    406.45
    Specification Sheet SDS

  • 2-Methylpyrazolo[1,5-a]pyrimidine-6-carboxylic acid

    Purity:
    ≥ 97% (HPLC)
    Catalog Number:
    43230
    CAS Number:
    739364-95-5
    Purity Limit:
    ≥ 97% (HPLC)
    MDL NO:
    MFCD19443280
    Molecular Formula:
    C8H7N3O2
    Molecular Weight:
    177.16
    Specification Sheet SDS

  • 1,3-Dihydroxy-9H-xanthen-9-one

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    43252
    CAS Number:
    3875-68-1
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00800670
    Molecular Formula:
    C13H8O4
    Molecular Weight:
    228.2
    Specification Sheet SDS

  • Hexahydro-4-azepinone hydrochloride

    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    4-Azepanone hydrochloride
    Catalog Number:
    43253
    CAS Number:
    50492-22-3
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD02183487
    Molecular Formula:
    C6H11NO·HCl
    Molecular Weight:
    149.62
    Specification Sheet SDS

  • 7,8-Dimethoxy-1H-benzo[d]azepin-2(3H)-one

    Purity:
    ≥ 98% (GC)
    Synonym:
    1,3-Dihydro-7,8-dimethoxy-2H-3-benzazepin-2-one
    Catalog Number:
    43244
    CAS Number:
    73942-87-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD02091565
    Molecular Formula:
    C12H13NO3
    Molecular Weight:
    219.24
    Specification Sheet SDS

  • 3,4-Methylenedioxyphenylacetic acid

    Purity:
    ≥ 98% (GC)
    Synonym:
    (1,3-Benzodioxol-5-yl)acetic acid
    Catalog Number:
    43237
    CAS Number:
    2861-28-1
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00014576
    Molecular Formula:
    C9H8O4
    Molecular Weight:
    180.16
    Specification Sheet SDS

  • 3,4-Methylenedioxyphenylacetonitrile

    Purity:
    ≥ 98% (GC)
    Synonym:
    3,4-Methylenedioxybenzyl cyanide
    Catalog Number:
    43245
    CAS Number:
    4439-02-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005835
    Molecular Formula:
    C9H7NO2
    Molecular Weight:
    161.16
    Specification Sheet SDS

  • Tetrathiafulvalene

    Purity:
    ≥ 98% (GC)
    Synonym:
    TTF
    Catalog Number:
    43248
    CAS Number:
    31366-25-3
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005492
    Molecular Formula:
    C6H4S4
    Molecular Weight:
    204.34
    Specification Sheet SDS

  • Thietane 1,1-dioxide

    Purity:
    ≥ 95% (GC)
    Synonym:
    Trimethylene sulfone
    Catalog Number:
    43250
    CAS Number:
    5687-92-3
    Purity Limit:
    ≥ 95% (GC)
    MDL NO:
    MFCD00088478
    Molecular Formula:
    C3H6O2S
    Molecular Weight:
    106.14
    Specification Sheet SDS

  • Dodecahydrodibenzofuran (mixture of isomers)

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43243
    CAS Number:
    13054-98-3
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD30749260
    Molecular Formula:
    C12H20O
    Molecular Weight:
    180.29
    Specification Sheet SDS

  • 7-Deazapurine

    Purity:
    ≥ 98% (GC)
    Synonym:
    7H-Pyrrolo[2,3-d]pyrimidine
    Catalog Number:
    43247
    CAS Number:
    271-70-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD08234403
    Molecular Formula:
    C6H5N3
    Molecular Weight:
    119.13
    Specification Sheet SDS

  • 1,4-Dioxene

    Hazmat
    Purity:
    ≥ 98% (GC)
    Synonym:
    2,3-Dihydro-1,4-dioxine
    Hazmat
    Catalog Number:
    43240
    CAS Number:
    543-75-9
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00082537
    Molecular Formula:
    C4H6O2
    Molecular Weight:
    86.09
    Specification Sheet SDS

  • 5,6-Dihydro-1,4-dithiin-2,3-dicarboximide

    Purity:
    ≥ 99% (Assay by titration)
    Synonym:
    2,3-Dihydro-1,4-dithiino[2,3-c]pyrrole-5,7-dione
    Catalog Number:
    43241
    CAS Number:
    24519-85-5
    Purity Limit:
    ≥ 99% (Assay by titration)
    MDL NO:
    MFCD01632185
    Molecular Formula:
    C6H5NO2S2
    Molecular Weight:
    187.23
    Specification Sheet SDS

  • Dibenzo[b,e][1,4]dioxine

    Purity:
    ≥ 99% (GC)
    Synonym:
    Dibenzo-p-dioxine
    Catalog Number:
    43239
    CAS Number:
    262-12-4
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00022282
    Molecular Formula:
    C12H8O2
    Molecular Weight:
    184.19
    Specification Sheet SDS

  • trans-2,3-Dichloro-1,4-dioxane

    Hazmat
    Purity:
    ≥ 96% (GC)
    Synonym:
    trans-2,3-Dichloro-1,4-diethylene dioxide
    Hazmat
    Catalog Number:
    43234
    CAS Number:
    3883-43-0
    Purity Limit:
    ≥ 96% (GC)
    MDL NO:
    MFCD00191421
    Molecular Formula:
    C4H6Cl2O2
    Molecular Weight:
    156.99
    Specification Sheet SDS

  • Thieno[3,2-d]pyrimidin-4(1H)-one

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    43242
    CAS Number:
    16234-10-9
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00122140
    Molecular Formula:
    C6H4N2OS
    Molecular Weight:
    152.17
    Specification Sheet SDS

  • 10-Methoxy-5H-dibenzo[b,f]azepine

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    10-Methoxy-2,2'-iminostilbene
    Catalog Number:
    43227
    CAS Number:
    4698-11-7
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00101079
    Molecular Formula:
    C15H13NO
    Molecular Weight:
    223.28
    Specification Sheet SDS

  • Heptamethyleneimine

    Hazmat
    Purity:
    ≥ 98% (GC)
    Synonym:
    Azacyclooctane
    Hazmat
    Catalog Number:
    43217
    CAS Number:
    1121-92-2
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00003270
    Molecular Formula:
    C7H15N
    Molecular Weight:
    113.2
    Specification Sheet SDS

  • 8-Azahypoxanthine

    Purity:
    ≥ 98% (Assay by titration)
    Catalog Number:
    43222
    CAS Number:
    2683-90-1
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00005804
    Molecular Formula:
    C4H3N5O
    Molecular Weight:
    137.1
    Specification Sheet SDS

  • 4-Methyl-1,3-dioxane

    Hazmat
    Purity:
    ≥ 99% (GC)
    Hazmat
    Catalog Number:
    43228
    CAS Number:
    1120-97-4
    Purity Limit:
    ≥ 99% (GC)
    MDL NO:
    MFCD00006569
    Molecular Formula:
    C5H10O2
    Molecular Weight:
    102.13
    Specification Sheet SDS

  • Ethyl 1,3-dithiolane-2-carboxylate

    Purity:
    ≥ 97% (GC)
    Synonym:
    1,3-Dithiolane-2-carboxylic acid ethyl ester
    Catalog Number:
    43238
    CAS Number:
    20461-99-8
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD00005411
    Molecular Formula:
    C6H10O2S2
    Molecular Weight:
    178.26
    Specification Sheet SDS

  • 4,5-Methylenedithio-1,3-dithiole-2-thione

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43233
    CAS Number:
    70800-59-8
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00137884
    Molecular Formula:
    C4H2S5
    Molecular Weight:
    210.36
    Specification Sheet SDS

  • 1,4-Thioxane

    Hazmat
    Purity:
    ≥ 97% (GC)
    Synonym:
    1,4-Oxathiane
    Hazmat
    Catalog Number:
    43229
    CAS Number:
    15980-15-1
    Purity Limit:
    ≥ 97% (GC)
    MDL NO:
    MFCD00006573
    Molecular Formula:
    C4H8OS
    Molecular Weight:
    104.17
    Specification Sheet SDS

  • 2,4,6-Trimethylpyrylium tetrafluoroborate

    Hazmat
    Purity:
    ≥ 98% (HPLC)
    Hazmat
    Catalog Number:
    43236
    CAS Number:
    773-01-3
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00032098
    Molecular Formula:
    C8H11BF4O
    Molecular Weight:
    209.98
    Specification Sheet SDS

  • Piperonylonitrile

    Purity:
    ≥ 98% (GC)
    Synonym:
    1,3-Benzodioxole-5-carbonitrile
    Catalog Number:
    43224
    CAS Number:
    4421-09-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005820
    Molecular Formula:
    C8H5NO2
    Molecular Weight:
    147.13
    Specification Sheet SDS

  • 7-Hydroxythieno[3,2-b]pyridine

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    43226
    CAS Number:
    107818-20-2
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD01863636
    Molecular Formula:
    C7H5NOS
    Molecular Weight:
    151.18
    Specification Sheet SDS

  • 1-Methylhomopiperazine

    Hazmat
    Purity:
    ≥ 97% (NMR)
    Hazmat
    Catalog Number:
    43232
    CAS Number:
    4318-37-0
    Purity Limit:
    ≥ 97% (NMR)
    MDL NO:
    MFCD00059810
    Molecular Formula:
    C6H14N2
    Molecular Weight:
    114.19
    Specification Sheet SDS

  • Thioxanthone

    Purity:
    ≥ 98% (GC)
    Synonym:
    9-Oxothioxanthene
    Catalog Number:
    43231
    CAS Number:
    492-22-8
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005066
    Molecular Formula:
    C13H8OS
    Molecular Weight:
    212.27
    Specification Sheet SDS

  • 8-Hydroxy-1,1,7,7-tetramethyljulolidine-9-carboxaldehyde

    Purity:
    ≥ 98% (GC)
    Synonym:
    9-Formyl-8-hydroxy-1,1,7,7-tetramethyljulolidine
    Catalog Number:
    43225
    CAS Number:
    115662-09-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00142785
    Molecular Formula:
    C17H23NO2
    Molecular Weight:
    273.38
    Specification Sheet SDS

  • 5-[4-(Diethylamino)benzylidene]rhodanine

    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    4-Diethylaminobenzalrhodanine
    Catalog Number:
    43212
    CAS Number:
    35778-58-6
    Purity Limit:
    ≥ 98% (Assay by titration)
    MDL NO:
    MFCD00193758
    Molecular Formula:
    C14H16N2OS2
    Molecular Weight:
    292.42
    Specification Sheet SDS

  • 2-Methyl-4(1H)-quinazolinone

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43235
    CAS Number:
    1769-24-0
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD01457186
    Molecular Formula:
    C9H8N2O
    Molecular Weight:
    160.18
    Specification Sheet SDS

  • 2-Pyrazoline

    Hazmat
    Purity:
    ≥ 95% (GC)
    Hazmat
    Catalog Number:
    43223
    CAS Number:
    109-98-8
    Purity Limit:
    ≥ 95% (GC)
    MDL NO:
    MFCD00059715
    Molecular Formula:
    C3H6N2
    Molecular Weight:
    70.1
    Specification Sheet SDS

  • Phenoxathiin

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    43220
    CAS Number:
    262-20-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00046933
    Molecular Formula:
    C12H8OS
    Molecular Weight:
    200.26
    Specification Sheet SDS

  • Piperonylacetone

    Purity:
    ≥ 98% (GC)
    Synonym:
    4-(1,3-Benzodioxol-5-yl)-2-butanone
    Catalog Number:
    43203
    CAS Number:
    55418-52-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00016910
    Molecular Formula:
    C11H12O3
    Molecular Weight:
    192.21
    Specification Sheet SDS

  • Anthra[1,9-cd]pyrazol-6(2H)-one

    Purity:
    ≥ 95% (HPLC)
    Synonym:
    Dibenzo[cd,g]indazol-6(2H-one
    Catalog Number:
    43216
    CAS Number:
    129-56-6
    Purity Limit:
    ≥ 95% (HPLC)
    MDL NO:
    MFCD00022289
    Molecular Formula:
    C14H8N2O
    Molecular Weight:
    220.23
    Specification Sheet SDS

  • 4-[2-(2-Amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoic acid

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    2-Amino-4,7-dihydro-5-[2-[4-(carboxy)phenyl]ethyl]-4-oxo-3H-pyrrolo[2,3-d]pyrimidine
    Catalog Number:
    43218
    CAS Number:
    137281-39-1
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD11040439
    Molecular Formula:
    C15H14N4O3
    Molecular Weight:
    298.3
    Specification Sheet SDS

  • 6-Nitropiperonal

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    3,4-Methylenedioxy-6-nitrobenzaldehyde
    Catalog Number:
    43210
    CAS Number:
    712-97-0
    Purity Limit:
    ≥ 98% (HPLC)
    MDL NO:
    MFCD00005829
    Molecular Formula:
    C8H5NO5
    Molecular Weight:
    195.13
    Specification Sheet SDS

  • 3,4-Methylenedioxyaniline

    Purity:
    ≥ 98% (GC)
    Synonym:
    5-Amino-1,3-benzodioxole
    Catalog Number:
    43215
    CAS Number:
    14268-66-7
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00005832
    Molecular Formula:
    C7H7NO2
    Molecular Weight:
    137.14
    Specification Sheet SDS

  • 1,3,5-Trithiane

    Purity:
    ≥ 98% (GC)
    Synonym:
    Thioformaldehyde trimer
    Catalog Number:
    43219
    CAS Number:
    291-21-4
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00006653
    Molecular Formula:
    C3H6S3
    Molecular Weight:
    138.26
    Specification Sheet SDS

  • 4-n-Octyl-4H-dithieno[3,2-b:2',3'-d]pyrrole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    43221
    CAS Number:
    141029-75-6
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD26793506
    Molecular Formula:
    C16H21NS2
    Molecular Weight:
    291.47
    Specification Sheet SDS

  • 5-(4-Hydroxybenzyl)-2,4-thiazolidinedione

    Purity:
    ≥ 95% (HPLC)
    Catalog Number:
    43209
    CAS Number:
    74772-78-4
    Purity Limit:
    ≥ 95% (HPLC)
    MDL NO:
    MFCD00754499
    Molecular Formula:
    C10H9NO3S
    Molecular Weight:
    223.25
    Specification Sheet SDS

  • Hexamethylene oxide

    Hazmat
    Purity:
    ≥ 98% (GC)
    Synonym:
    Oxacycloheptane
    Hazmat
    Catalog Number:
    43213
    CAS Number:
    592-90-5
    Purity Limit:
    ≥ 98% (GC)
    MDL NO:
    MFCD00003266
    Molecular Formula:
    C6H12O
    Molecular Weight:
    100.16
    Specification Sheet SDS

  • 5-Propyl-1,3-dithiolo[4,5-d][1,3]dithiole-2-thione

    Purity:
    ≥ 93% (HPLC)
    Catalog Number:
    43208
    CAS Number:
    202126-48-5
    Purity Limit:
    ≥ 93% (HPLC)
    MDL NO:
    MFCD08276417
    Molecular Formula:
    C7H8S5
    Molecular Weight:
    252.44
    Specification Sheet SDS
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