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Study Information
Study Attribute Value
CEBS Accession Number: 002-02051-0001-0000-1
Chemical Name: Diisononyl phthalate
CASRN: 28553-12-0
NTP Study Type: Genetic Toxicology - Bacterial Mutagenicity
NTP Study ID: 026376
Vehicle Control: Dimethyl Sulfoxide
Study Result: Negative

Table Instructions and Notes:
You are currently viewing the results for this Salmonella study's detailed data.
Individual strain data is presented as mean ± standard error.
Abbreviations are noted at bottom of page.
Trial summary calls are shown in parentheses.
Standard NTP Protocol

Strain: TA100
Dose No Activation
(Negative)
No Activation
(Negative)
10% RLI
(Negative)
10% RLI
(Negative)
10% HLI
(Negative)
10% HLI
(Negative)
Protocol Preincubation Preincubation Preincubation Preincubation Preincubation Preincubation
ug/Plate Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM
 0         
112 5.8 116 7.8 114 6 114 6.9 106 2.3 135 6.9
100         
112 8.5 98 10.1 120 5.6 103 11.5 121 10.6 127 1.2
333         
117 2.7 84 13.1 111 1.3 92 2.4 103 8.2 97 6
1000         
117 5.2 108 16.4 122 7 104 2.6 120 7.8 110 7.8
3333         
104 3.5 93 18.2 104 9.7 99 4.5 109 2.3 99 14.4
10000         
122 p 7.6 95 14.7 111 p 1.8 103 p 4.8 99 p 7.7 99 p 4.8
Positive Control 414 9.4 361 3.2 455 11.5 1075 61 1578 41.2 1316 178.5

Strain: TA1535
Dose No Activation
(Negative)
No Activation
(Negative)
10% RLI
(Negative)
10% RLI
(Negative)
10% HLI
(Negative)
10% HLI
(Negative)
Protocol Preincubation Preincubation Preincubation Preincubation Preincubation Preincubation
ug/Plate Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM
 0         
27 3.8 35 4.6 10 2.8 9 2.3 17 1.7 16 1.5
100         
33 3.3 32 3 9 3.2 8 2 16 1.5 11 2.9
333         
38 9 33 1.8 10 1.2 8 2 12 3.5 11 2.3
1000         
35 3 31 1.3 11 2.1 10 2.2 11 2 8 2.3
3333         
35 3.7 38 2.6 8 2 10 1.5 13 2.6 8 1.9
10000         
31 p 2.6 28 p 1.8 9 p 2.5 10 p 1.2 9 p 1.8 11 p 2.6
Positive Control 501 3 449 32.9 246 24.7 209 9 534 3.2 564 13

Strain: TA1537
Dose No Activation
(Negative)
No Activation
(Negative)
10% RLI
(Negative)
10% RLI
(Negative)
10% HLI
(Negative)
10% HLI
(Negative)
Protocol Preincubation Preincubation Preincubation Preincubation Preincubation Preincubation
ug/Plate Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM
 0         
6 1.3 5 1.5 9 1.8 7 2.1 7 2.9 5 .7
100         
5 1 4 .6 8 2.4 8 1.7 7 3 6 1.9
333         
5 2 7 1.3 11 1.9 7 1.2 10 .3 5 .9
1000         
5 .6 6 1.9 6 .6 5 .3 5 1.5 7 .9
3333         
5 1.5 4 .9 10 2 8 0 9 1.7 8 2.3
10000         
5 p .9 6 p 2 7 p .9 8 p 1.7 6 p .7 7 p 1.2
Positive Control 414 93.3 181 11 127 2.1 210 1.8 287 13.7 357 66.4

Strain: TA98
Dose No Activation
(Negative)
No Activation
(Negative)
10% RLI
(Negative)
10% RLI
(Negative)
10% HLI
(Negative)
10% HLI
(Negative)
Protocol Preincubation Preincubation Preincubation Preincubation Preincubation Preincubation
ug/Plate Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM Mean ±SEM
 0         
19 2.9 20 3.5 29 5 28 .9 33 2.1 28 2.3
100         
14 3.2 14 .3 29 .9 23 2.5 23 3.8 29 .7
333         
18 1.7 15 3.2 27 1.7 22 4.2 31 4.4 27 1.5
1000         
20 2.3 16 .3 24 3.2 25 3.2 26 2.4 25 2.3
3333         
20 3.8 17 2.2 24 2.7 20 3.2 24 4.9 22 3.5
10000         
15 p 3.4 15 p 1.5 26 p 3.8 25 p 5 30 p 3.1 27 p 1.2
Positive Control 818 37.7 876 40.4 427 63.3 919 31.5 1493 10.8 1543 78.5

Abbreviations:
RLI = induced male Sprague Dawley rat liver S9
HLI = induced male Syrian hamster liver S9
s = Slight Toxicity; p = Precipitate; x = Slight Toxicity and Precipitate; t = Toxic;