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JChem Base License Key

The maximum number of substructure and similarity searches per minute allowed by JChem Base is calculated from the license key entered using JChemManager. If no license key has been specified, then the program is in demo mode that allows one search per minute. Without a license key sent by ChemAxon or one of its distributors, the program can only be used for evaluation.

Before applying for a license key, the maximum number of substructure and similarity searches per minute should be predicted.

The following table helps you to determine the optimal access level. Using the Poisson distribution, the maximum number of searches can be calculated from the average number of searches at a given probability level.

Example for using the table:

Assume that you would like to be 99% sure that the maximum number of searches will not be exceeded in a one minute period. If you expect that the average number of searches will be 10 per minute at peak time, then choose 17 for the access level.

Please send your selection to ChemAxon when you request price information or a new license key allowing more searches.

AverageMax. (p=90%)Max. (p=99%)Max. (p=99.9%)
1134
2357
3479
46810
571012
681114
791315
8111417
9121619
10131720
11141822
12162023
13172124
14182226
15192427
16202529
17212630
18232831
19242933
20253034
21263135
22273337
23283438
24293539
25313641
26323842
27333943
28344045
29354146
30364247
31374449
32384550
33394651
34414752
35424854
36435055
37445156
38455257
39465359
40475460
41485661
42495762
43515864
44525965
45536066
46546167
47556369
48566470
49576571
50586672
51596773
52606875
53617076
54637177
55647278
56657379
57667481
58677582
59687783
60697884
61707986
62718087
63728188
64738289
65748390
66768591
67778693
68788794
69798895
70808996
71819097
72829199
738393100
748494101
758595102
768696103
778797104
788898106
798999107
8091101108
8192102109
8293103110
8394104112
8495105113
8596106114
8697107115
8798108116
8899110117
89100111119
90101112120
91102113121
92103114122
93104115123
94106116124
95107117125
96108119127
97109120128
98110121129
99111122130
100112123131
101113124132
102114125134
103115126135
104116127136
105117129137
106118130138
107119131139
108120132140
109121133142
110123134143
111124135144
112125136145
113126137146
114127139147
115128140149
116129141150
117130142151
118131143152
119132144153
120133145154
121134146155
122135147157
123136149158
124137150159
125138151160
126139152161
127141153162
128142154163
129143155164
130144156166
131145157167
132146158168
133147160169
134148161170
135149162171
136150163172
137151164174
138152165175
139153166176
140154167177
141155168178
142156169179
143157171180
144158172181
145160173183
146161174184
147162175185
148163176186
149164177187
150165178188
151166179189
152167180190
153168181192
154169183193
155170184194
156171185195
157172186196
158173187197
159174188198
160175189199
161176190201
162177191202
163178192203
164180194204
165181195205
166182196206
167183197207
168184198208
169185199210
170186200211
171187201212
172188202213
173189203214
174190204215
175191205216
176192207217
177193208219
178194209220
179195210221
180196211222
181197212223
182198213224
183199214225
184200215226
185202216227
186203217229
187204219230
188205220231
189206221232
190207222233
191208223234
192209224235
193210225236
194211226237
195212227239
196213228240
197214229241
198215230242
199216232243
200217233244