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Home » Products » Very Small Molecules (FW<150)
Very Small Molecules (FW<150)
With formula weights below 150, these building blocks are particularly useful for exploring chemical space in drug discovery programs while maintining the low FW required for good bioavailability in drug candidates.
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS001691
CASRN:   2302-39-8
MFCD #:   
96 4,5-Dimethyl-1H-imidazole
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
95 195 395 895 2995 4995
Catalog #:   FS001818
CASRN:   88211-50-1
MFCD #:   MFCD06658391
106 But-3-ynylamine hydrochloride
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 395 1495 5495
Catalog #:   FS000701
CASRN:   288-16-4
MFCD #:   MFCD00020818
85 Isothiazole
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
    95 295 1295 2995
Catalog #:   FS008016
CASRN:   253-72-5
MFCD #:   MFCD00059750
130 [1,6]Naphthyridine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 145 295 995 2995
Catalog #:   FS007707
CASRN:   1010097-82-1
MFCD #:   MFCD11111955
134 O-(2,2-Difluoroethyl)hydroxylamine hydrochloride
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      995 3995 6995
Catalog #:   FS010001
CASRN:   148644-09-1
MFCD #:   
87.12 3-Methoxyazetidine hydrochloride
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      595 1295 3490
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS009027
CASRN:   4025-71-2
MFCD #:   
205 2-Methoxyethanesulfonyl chloride
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
    295 495 1995  
Catalog #:   FS005032
CASRN:   5918-93-4
MFCD #:   MFCD00040252
84 1,3-Dihydro-imidazol-2-one
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 495 1350 3995
Catalog #:   FS009086
CASRN:   54149-39-2
MFCD #:   mfcdx
91 O-(2-Methoxy-ethyl)-hydroxylamine
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
        995 2995
Catalog #:   FS009093
CASRN:   3279-95-6
MFCD #:   
77 2-Aminooxy-ethanol
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      495 995 2995
Catalog #:   FS001256
CASRN:   225647-12-1
MFCD #:   MFCD00829762
122 4,5,6,7-Tetrahydro-1H-benzoimidazole
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
95 245 495 1195 3995 7995
Catalog #:   FS002083
CASRN:   17557-84-5
MFCD #:   
108 3-Azetidinone hydrochloride
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
95 195 495 795 2295 3995
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS008809
CASRN:   617718-46-4
MFCD #:   MFCD05663715
112 3-Fluoroazetidine Hydrochloride
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
195 295 595 995 2995 6995
Catalog #:   FS001325
CASRN:   137270-23-6
MFCD #:   MFCD09838145
124 O-Cyclobutyl-hydroxylamine hydrochloride
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
95 195 395 895 2995 5995
Catalog #:   FS007136
CASRN:   152922-71-9
MFCD #:   MFCD08235273
111 (1-Hydroxymethyl-cyclopropyl)-acetonitrile
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      295 795 1950
Catalog #:   FS001241
CASRN:   37988-38-8
MFCD #:   MFCD00209259
137 2-Pyridin-2-yl-propan-2-ol
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 495 1995 6495
Catalog #:   FS000313
CASRN:   5469-70-5
MFCD #:   MFCD01529869
95 3-Aminopyridazine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 145 295 995 2495
Catalog #:   FS007939
CASRN:   54709-94-3
MFCD #:   
110 3-Hydroxy-5-methyl-pyridazine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 495 1795 2995
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS001110
CASRN:   210169-05-4
MFCD #:   
112 3-Amino-5-fluoropyridine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      295 495 1295
Catalog #:   FS001009
CASRN:   42242-11-5
MFCD #:   MFCD02181031
119 3-Amino-pyridine-2-carbonitrile
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 295 1295 3995
Catalog #:   FS000314
CASRN:   89203-22-5
MFCD #:   
132 3-aminopyridazine hydrochloride
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 80 95 195 895 1995
Catalog #:   FS002125
CASRN:   271-34-1
MFCD #:   MFCD00955936
118 5-Azaindole
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 125 245 495 1595 3495
Catalog #:   FS002126
CASRN:   271-29-4
MFCD #:   MFCD01686899
118 6-Azaindole
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
  75 95 195 850 1950
Catalog #:   FS005034
CASRN:   623547-65-9
MFCD #:   MFCD07357406
140 4-tert-Butyl-1,3-dihydro-imidazol-2-one
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 395 1650 2950
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS001092
CASRN:   22620-34-4
MFCD #:   MFCD09743969
144 (5-Chloro-pyridin-3-yl)-methanol
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      295 995 2495
Catalog #:   FS005058
CASRN:   526183-12-0
MFCD #:   MFCD05190093
139 2-Cyclobutyl-piperidine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
95 195 295 995 2495 4995
Catalog #:   FS001027
CASRN:   290313-23-4
MFCD #:   MFCD00174354
149 2-Cyclopropylamino-3-aminopyridine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
  95 195 495 1950 3450
Catalog #:   FS000768
CASRN:   57531-01-8
MFCD #:   MFCD06657726
142 [1,4]Diazocane-5,8-dione
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 145 295 495 1950  
Catalog #:   FS005033
CASRN:   1072-89-5
MFCD #:   MFCD00459895
112 4,5-Dimethyl-1,3-dihydro-imidazol-2-one
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 495 1950 2950
Catalog #:   FS001813
CASRN:   4298-52-6
MFCD #:   MFCD03425129
108 2-Ethynylthiophene
(Purity >90%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      395 995 2495
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS007140
CASRN:   954236-33-0
MFCD #:   MFCD09864696
126 6-Fluoro-4-methyl-pyridin-3-ylamine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 145 295 995 1995
Catalog #:   FS007053
CASRN:   173435-32-0
MFCD #:   MFCD04112556
126 2-Fluoro-4-methyl-pyridin-3-ylamine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
95 195 495 950 1995 3995
Catalog #:   FS005075
CASRN:   26258-21-9
MFCD #:   
138 1,3,4,5,6,7-Hexahydro-benzoimidazol-2-one
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 495 2295 4495
Catalog #:   FS002114
CASRN:   875-66-1
MFCD #:   MFCD00956158
146 4-Hydroxy-cinnoline
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 495 1995 3495
Catalog #:   FS007148
CASRN:   766-55-2
MFCD #:   MFCD07782103
119 Imidazo[1,2-b]pyridazine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 495 1495 3495
Catalog #:   FS007102
CASRN:   162515-68-6
MFCD #:   MFCD03411600
146 (1-Mercaptomethyl-cyclopropyl)-acetic acid
(Purity >%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 395 1450 4350
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS010791
CASRN:   847818-55-7
MFCD #:   
126 1-Methyl-1H-pyrazole-4-boronic acid hydrochloride
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
95 195 295 495 1495 4995
Catalog #:   FS005040
CASRN:   915402-10-7
MFCD #:   MFCD09834615
134 (3-Methylenecyclobutyl)methanamine hydrochloride
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      950 2550 3950
Catalog #:   FS000658
CASRN:   693-92-5
MFCD #:   MFCD00955579
99 3-methylisothiazole
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
    395 495 2495 6495
Catalog #:   FS000717
CASRN:   931-07-7
MFCD #:   MFCD01716903
130 4-Nitro-isothiazole
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
95 295 495 1950 3995  
Catalog #:   FS011416
CASRN:   6635-88-7
MFCD #:   MFCD06657774
134 (1-Oxy-pyridin-3-yl)-acetonitrile
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 295 1350 3950
Catalog #:   FS002110
CASRN:   272-15-1
MFCD #:   MFCD08706439
136 Thieno[2,3-d]pyridazine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 495 1995 4995
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS010030
CASRN:   
MFCD #:   
113.12 1-Acetylazetidin-3-one
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      895 2995 4995
Catalog #:   FS007542
CASRN:   64527-28-2
MFCD #:   MFCD02598860
100 4-Amino-isothiazole
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      1995    
Catalog #:   FS000771
CASRN:   273-77-8
MFCD #:   MFCD00047265
136 Benzo[1,2,3]thiadiazole
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      1350 2950 4950
Catalog #:   FS002055
CASRN:   14315-15-2
MFCD #:   MFCD00130098
148 3-Bromo-2-nitro-benzo[b]thiophene
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      950 2950 4950
Catalog #:   FS001029
CASRN:   929074-42-0
MFCD #:   MFCD09263519
144 5-Chloro-3,4-diaminopyridine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
95 295 395 850 3495 6995
Catalog #:   FS000659
CASRN:   20067-16-7
MFCD #:   MFCD08706054
134 5-Chloro-3-methyl-isothiazole
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      1995 3495 4950
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS001107
CASRN:   38186-84-4
MFCD #:   MFCD04972725
146 2-Chloro-5-fluoro-6-methylpyridine
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
        1995 2995
Catalog #:   FS001091
CASRN:   189449-41-0
MFCD #:   MFCD09743993
144 (4-Chloro-pyridin-3-yl)-methanol
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
          1450
Catalog #:   FS005044
CASRN:   122813-75-6
MFCD #:   MFCD00116489
131 1-Cyclopropylhydrazinecarbothioamide
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      895 2141 3949
Catalog #:   FS005300
CASRN:   7544-75-4
MFCD #:   MFCD00790772
121 4,5-Dihydro-3H-pyrrol-2-ylamine hydrochloride
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
        2495 4495
Catalog #:   FS001690
CASRN:   53316-51-1
MFCD #:   MFCD09743540
133 4,5-Dimethyl-1H-imidazole; hydrochloride
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
75 95 195 495 1950 3950
Catalog #:   FS005021
CASRN:   83335-28-8
MFCD #:   MFCD02823969
138 2-Ethenylthio-pyrimidine
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      1350 2950 4950
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS005046
CASRN:   83962-06-5
MFCD #:   MFCD00138066
112 4-Ethyl-1,3-dihydro-imidazol-2-one
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
        2495 3995
Catalog #:   FS000667
CASRN:   
MFCD #:   
119 3H-Imidazo[4,5-c]pyridine
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      1995 3995 6995
Catalog #:   FS010919
CASRN:   70702-75-9
MFCD #:   MFCD09834624
121 3-Isopropenyl-1-methyl-1H-pyrrole
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
        1895 3495
Catalog #:   FS010913
CASRN:   99838-33-2
MFCD #:   MFCD09834619
137 8-Methyl-3-methylene-8-aza-bicyclo[3.2.1]octane
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
        1895 3495
Catalog #:   FS000668
CASRN:   63604-59-1
MFCD #:   
133 2-Methyl-3H-imidazo[4,5-c]pyridine
(Purity >95%)
In Stock: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
95 295 495 1095 2995  
Catalog #:   FS007295
CASRN:   1073-19-4
MFCD #:   MFCD11036121
144 5-Methyl-4-nitro-isothiazole
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      1950 3990 6990
Catalog Number Structure FW Chemical Name and % Purity Please scroll down for more structures
Catalog #:   FS007296
CASRN:   1073-18-3
MFCD #:   MFCD11036122
144 3-Methyl-4-nitro-isothiazole
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      1390 3990 9900
Catalog #:   FS000716
CASRN:   693-97-0
MFCD #:   MFCD00003160
99 5-Methyl-isothiazole
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
        2995 5995
Catalog #:   FS010003
CASRN:   959957-92-7
MFCD #:   
86 1-Methylazetidin-3-amine
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
        1995 4995
Catalog #:   FS005041
CASRN:   885267-01-6
MFCD #:   MFCD08706303
126 N'-Hydroxy-3-methylenecyclobutanecarboximidamide
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      695 1995 3995
Catalog #:   FS007104
CASRN:   23761-23-1
MFCD #:   MFCD00100900
114 3-Oxo-cyclobutanecarboxylic acid
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
        1295 2495
Catalog #:   FS009500
CASRN:   763120-58-7
MFCD #:   
112 Pyrazole-4-boronic acid
(Purity >95%)
Special Order*: Price in US$
10
mg		 100
mg		 250
mg		 1g 5g 20g
      895 1495 3995


*Note concerning Special Order chemicals: these are made to order with a typical lead time of 6 weeks.
Minimum order sizes apply (usually 1 gram).
Prices are listed in the catalog for available quantities only.
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