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 2,410
Aromatic Acid Chlorides 1,522
Aliphatic Acid Chlorides 888
All Carboxylic Acids 77,342
Aromatic Carboxylic Acids 29,589
Aliphatic Carboxylic Acids 47,896
Alpha Amino Acids 5,306
All Sulfonyl Chlorides 2,040
Aromatic Sulfonyl Chlorides 1,745
Aliphatic Sulfonyl Chlorides 295
All Amines 128,518
Primary Amines 74,894
Primary Aromatic Amines 39,454
Primary Aliphatic Amines 35,840
Secondary Amines 56,010
Secondary Aromatic Amines 19,619
Secondary Aliphatic Amines 36,956
Aromatic Amines 57,806
Aliphatic Amines 72,399
Cyclic Amines 27,967
All Boronic Acids 16,409
Aromatic Boronic Acids 15,335
Aliphatic Boronic Acids 1,076
Functional Group Items
All Isocyanates 490
Aromatic Isocyanates 280
Aliphatic Isocyanates 210
All Alcohols 71,731
Aromatic Alcohols 30,253
Aliphatic Alcohols 43,982
All Aldehydes 14,953
Aromatic Aldehydes 12,823
Aliphatic Aldehydes 2,148
All Halogen Derivatives 166,719
Aromatic Halogen Derivatives 150,953
Aliphatic Halogen Derivatives 22,297
Not Fluorine Halogen Derivatives 130,517
Aliphatic Not Fluorine Halogen Derivatives 17,045
Aromatic Not Fluorine Halogen Derivatives 116,247
Bromine Halogen Derivatives 57,049
Aliphatic Bromine Halogen Derivatives 6,690
Aromatic Bromine Halogen Derivatives 50,971
All Azides 1,606
Aromatic Azides 234
Aliphatic Azides 1,372

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