Stock Building Blocks by Functional Groups

A directory of chemical building blocks that are commercially available and categorized by the functional groups present in those molecules. Functional groups are specific atoms or groups of atoms that determine the chemical properties and reactivity of a molecule. You can browse the directory by selecting a functional group from the list below or you can download files with all building blocks for offline selection and filtering.

Functional Group Items
All Acid Chlorides 2,674
Aromatic Acid Chlorides 1,670
Aliphatic Acid Chlorides 1,004
All Carboxylic Acids 96,228
Aromatic Carboxylic Acids 35,032
Aliphatic Carboxylic Acids 61,373
Alpha Amino Acids 6,779
All Sulfonyl Chlorides 2,263
Aromatic Sulfonyl Chlorides 1,937
Aliphatic Sulfonyl Chlorides 326
All Amines 158,254
Primary Amines 93,053
Primary Aromatic Amines 48,782
Primary Aliphatic Amines 44,805
Secondary Amines 68,187
Secondary Aromatic Amines 24,503
Secondary Aliphatic Amines 44,411
Aromatic Amines 71,765
Aliphatic Amines 88,772
Cyclic Amines 33,155
All Boronic Acids 17,506
Aromatic Boronic Acids 16,238
Aliphatic Boronic Acids 1,270
Functional Group Items
All Isocyanates 568
Aromatic Isocyanates 317
Aliphatic Isocyanates 251
All Alcohols 100,043
Aromatic Alcohols 40,756
Aliphatic Alcohols 63,884
All Aldehydes 20,768
Aromatic Aldehydes 17,862
Aliphatic Aldehydes 2,925
All Halogen Derivatives 219,657
Aromatic Halogen Derivatives 200,378
Aliphatic Halogen Derivatives 26,822
Not Fluorine Halogen Derivatives 172,120
Aliphatic Not Fluorine Halogen Derivatives 20,265
Aromatic Not Fluorine Halogen Derivatives 155,028
Bromine Halogen Derivatives 76,501
Aliphatic Bromine Halogen Derivatives 8,058
Aromatic Bromine Halogen Derivatives 69,151
All Azides 2,283
Aromatic Azides 346
Aliphatic Azides 1,937
Functional Group Items
All Alkynes 7,636
Terminal Alkynes 5,185
All Ketones 54,502
Aromatic Ketones 37,706
Aliphatic Ketones 43,335
Methyl Ketones 9,268
All Sulfinates 256
Aromatic Sulfinates 147
Aliphatic Sulfinates 109

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