Di(2-ethylhexyl)phthalate: Carcinogenic Potency Database

di(2-Ethylhexyl)phthalate (CAS 117-81-7)
SMILES, InChI and Structure are below.
Rats and Mice: Cancer Test Summary

Rat Target Sites		Mouse Target Sites		TD₅₀ (mg/kg/day)
Male	Female	Male	Female	Rat	Mouse
liv	liv	liv	liv	716^m	700^m

Key to the Table Above

Positivity: For each chemical with a positive (carcinogenic) experiment in the Carcinogenic Potency Database (CPDB), results are included on carcinogenic potency (TD₅₀) in each species and target sites in males and females. Positivity is determined by an author’s opinion in a published paper. If all experimental results in the CDPB are negative in a sex-species group, “no positive” appears. If the CPDB has no experiments in the sex-species group, “no test” appears. The summary presents the strongest evidence of carcinogenicity in each group. If there are both positive and negative experiments in a sex-species, the negative results are ignored in this Summary Table.

Target Site Codes: liv = liver. Target sites are listed if any author of published experimental results concluded that tumors were induced in that organ by the test agent. If there is more than one positive experiment in a sex-species, target sites listed may be from more than one experiment, e.g. if liver and lung are both listed, then liver may have been a target in one experiment and lung in another.

TD₅₀: Our standardized measure of carcinogenic potency, TD₅₀, is the daily dose rate in mg/kg body weight/day to induce tumors in half of test animals that would have remained tumor-free at zero dose. Whenever there is more than one positive experiment in a species, the reported TD₅₀ value is a Harmonic Mean calculated using the TD₅₀ value from the most potent target site in each positive experiment.

Superscripts: m = There is more than one positive experiment in the species, and TD₅₀ values from each positive experiment are used in the calculation of the reported Harmonic mean of TD₅₀.

The Carcinogenic Potency Database (CPDB) is a unique and widely used international resource of the results of 6540 chronic, long-term animal cancer tests on 1547 chemicals. The CPDB provides easy access to the bioassay literature, with qualitative and quantitative analyses of both positive and negative experiments that have been published over the past 50 years in the general literature through 2001 and by the National Cancer Institute/National Toxicology Program through 2004. The CPDB standardizes the diverse literature of cancer bioassays that vary widely in protocol, histopathological examination and nomenclature, and in the published author’s choices of what information to provide in their papers. Results are reported in the CPDB for tests in rats, mice, hamsters, dogs, and nonhuman primates.

For each experiment, information is included on species, strain, and sex of test animal; features of experimental protocol such as route of administration, duration of dosing, dose level(s) in mg/kg body weight/day, and duration of experiment; experimental results are provided on target organ, tumor type, and tumor incidence; carcinogenic potency (TD₅₀) and its statistical significance; shape of the dose-response, author’s opinion as to carcinogenicity, and literature citation.

Only tests with dosing for at least ¼ the standard lifespan of the species and experiment length at least ½ the lifespan are included in the CPDB. Only routes of administration with whole body exposure are included. Doses are standardized, average dose rates in mg/kg/day. A description of methods used in the CPDB to standardize the diverse literature of animal cancer tests is presented for: 1) Criteria for inclusion of experiments 2) Standardization of average daily dose levels and 3) TD₅₀ estimation for a standard lifespan. See Methods for other details.

TD₅₀ provides a standardized quantitative measure that can be used for comparisons and analyses of many issues in carcinogenesis. The range of TD₅₀ values across chemicals that are rodent carcinogens is more than 100 million-fold. More than half the chemicals tested are positive in at least one experiment.

A plot of all results on each experiment in the CPDB for this chemical is presented below. These results are the source information for the Cancer Test Summary table above.

di(2-Ethylhexyl)phthalate: All Experiments and Citations in CPDB

The definition of each code in the plot below will appear in a pop-up window when the field name in the header line is clicked, e.g., Strain, Site, Path. Each numbered line starts a new experiment and reports protocol information in black. Average daily dose-rates per kg body weight per day are in green. Remaining lines report experimental results in blue.

Abbreviations of fields in header line: # = the line number in the plot of all CPDB chemicals; Xpo = duration of dosing; Xpt = duration of experiment; Site = tissue; Path = tumor type; DR = dose-response; AuOp = author’s opinion about carcinogenicity; LoConf, UpConf = confidence limits (99%) on TD₅₀; Inc = tumor incidence for each dose group.

See Guide to reading the plot for details on each field, using an example of one experiment.

See Help to improve readability, or to fit the plot onto the screen or a printed page.



Chemical (Synonym) CAS
# Species Sex Strain Route Xpo+Xpt PaperNum        0 Dose  1 Dose 2 Dose  3 Dose          Literature Reference or NCI/NTP:Site Path
Site Path Notes   TD50  DR Pval    AuOp LoConf UpConf   Cntrl   1 Inc  2 Inc   3 Inc                                                        Brkly Code



DI(2-ETHYLHEXYL)PHTHALATE  (di-sec-octyl phthalate, DEHP) 117-81-7
2776 M f b6c eat 24m24 TR217 :                       0    383.mg  765.mg
 liv MXA        825.mg * P<.0005 c  513.mg 1.67gm   1/50   12/50   18/50                                              liv:hpa,hpc.
 liv hpc        1.05gm * P<.0005 c  638.mg 1.89gm   0/50    7/50   17/50
 TBA MXB        350.mg \ P<.003     175.mg 2.07gm  20/50   35/50  (35/50)
 liv MXB        825.mg * P<.0005    513.mg 1.67gm   1/50   12/50   18/50                                          liv:hpa,hpc,nnd.
 lun MXB        7.26gm * P<.07      2.20gm n.s.s.   0/50    1/50    2/50                                              lun:a/a,a/c.
2777 M f b6c eat 78w79 2442m                         0    12.8mg  64.2mg  193.mg  770.mg             David;faat,50,195-205;1999/2000
 liv mix Cekr   650.mg * P<.004  +  260.mg 5.48gm   0/15    1/10    1/10    1/10    6/15
 liv hpa Cekr   1.10gm * P<.04      363.mg n.s.s.   0/15    1/10    1/10    1/10    4/15
 liv hpc Cekr   2.66gm * P<.03      654.mg n.s.s.   0/15    0/10    0/10    0/10    2/15
2778 M f b6c eat 18m24 2442n                         0    579.mg
 liv mix Cer    553.mg   P<.0005 +  341.mg 1.03gm   3/55   30/55
 liv hpc Cer    834.mg   P<.0005    479.mg 1.87gm   3/55   23/55
 liv hpa Cer    1.50gm   P<.0005    790.mg 3.39gm   0/55   13/55
2779 M f b6c eat 24m24 2442o                         0    12.9mg  64.4mg  193.mg  773.mg
 liv mix Cer    463.mg * P<.0005 +  321.mg 723.mg   3/55    3/50    6/55   18/55   38/55
 liv hpa Cer    721.mg * P<.0005    493.mg 1.13gm   0/55    1/50    3/55    8/55   30/55
 liv hpc Cer    1.88gm * P<.0005    986.mg 6.21gm   3/55    2/50    3/55   10/55   14/55
2780 M m b6c eat 24m24 TR217 :                       0    353.mg  713.mg
 liv MXA        976.mg * P<.03   c  440.mg n.s.s.  14/50   25/49   29/50                                              liv:hpa,hpc.
 liv hpc        1.82gm * P<.08   c  736.mg n.s.s.   9/50   14/49   19/50
 TBA MXB        1.54gm * P<.4       413.mg n.s.s.  29/50   37/49   38/50
 liv MXB        976.mg * P<.03      440.mg n.s.s.  14/50   25/49   29/50                                          liv:hpa,hpc,nnd.
 lun MXB        no dre   P=1.       1.97gm n.s.s.  10/50    9/49    7/50                                              lun:a/a,a/c.
2781 M m b6c eat 78w79 2442m                         0    11.8mg  59.2mg  178.mg  711.mg             David;faat,50,195-205;1999/2000
 liv mix Cekr   46.4gm * P<1.       577.mg n.s.s.   1/15    1/10    3/10    1/10    2/15
2782 M m b6c eat 18m24 2442n                         0    535.mg
 liv hpc Cer    2.19gm   P<.03      898.mg n.s.s.   4/55   12/55
 liv mix Cer    2.37gm   P<.09   +  863.mg n.s.s.   7/55   14/55
2783 M m b6c eat 24m24 2442o                         0    11.9mg  59.4mg  178.mg  713.mg
 liv mix Cer    546.mg * P<.0005 +  330.mg 1.14gm   7/55   13/50   18/55   26/55   35/55
 liv hpc Cer    1.14gm * P<.0005    634.mg 3.07gm   4/55    5/50    8/55   14/55   21/55
 liv hpa Cer    1.74gm * P<.004     812.mg 13.6gm   3/55    9/50   11/55   13/55   18/55
2784 R f f34 eat 24m24 TR217 :                       0    294.mg  589.mg
 liv MXA        1.11gm * P<.0005 c  644.mg 2.40gm   0/50    6/50   13/50                                              liv:hpc,nnd.
 liv hpc        2.30gm * P<.002  c  1.12gm 5.90gm   0/50    2/50    8/50
 liv nnd        2.35gm * P<.02      1.11gm n.s.s.   0/50    4/50    5/50                                                           S
 TBA MXB        1.67gm * P<.6       321.mg n.s.s.  41/50   43/50   49/50
 liv MXB        1.11gm * P<.0005    644.mg 2.40gm   0/50    6/50   13/50                                          liv:hpa,hpc,nnd.
2785 R f f34 eat 78w79 2442m                         0    123.mg  617.mg                             David;faat,50,195-205;1999/2000
 liv mix Cek    848.mg * P<.02   +  255.mg n.s.s.   0/10    0/10    3/10
 liv hpc Cek    1.34gm * P<.05      328.mg n.s.s.   0/10    0/10    2/10
2786 R f f34 eat 18m24 2442n                         0    464.mg
 liv mix Cer    1.62gm   P<.0005 +  787.mg 4.17gm   0/70   10/55
 liv hpa Cer    2.81gm   P<.002     1.14gm 12.7gm   0/70    6/55
 liv hpc Cer    4.29gm   P<.01      1.48gm 524.gm   0/70    4/55
2787 R f f34 eat 24m24 2442o                         0    4.95mg  24.8mg  124.mg  619.mg
 liv mix Ce     1.56gm Z P<.0005 +  888.mg 3.42gm   0/70    4/50    1/55    3/55   19/70
 liv hpc Ce     2.59gm * P<.0005    1.35gm 6.39gm   0/70    1/50    0/55    1/55   12/70
 liv hpa Ce     5.19gm * P<.02      1.97gm n.s.s.   0/70    3/50    1/55    2/55    7/70
2788 R f f34 eat 24m24 2463                          0    15.0mg  50.0mg  600.mg               Cattley;clet,38,15-22;1987/pers.comm.
 liv mix Cer    1.16gm * P<.002  +  457.mg 7.23gm   0/20    1/20    1/20    6/20
 liv nnd Cer    1.95gm * P<.03      619.mg n.s.s.   0/20    1/20    1/20    4/20
 liv hpc Cer    4.35gm * P<.03      1.07gm n.s.s.   0/20    0/20    0/20    2/20
2789 R m f34 eat 24m24 TR217 :                       0    235.mg  475.mg
 liv MXA        1.17gm * P<.03   c  526.mg n.s.s.   3/50    6/50   12/50                                              liv:hpc,nnd.
 liv hpc        3.36gm * P<.2    c  1.13gm n.s.s.   1/50    1/50    5/50
 TBA MXB        no dre   P=1.       455.mg n.s.s.  36/50   35/50   34/50
 liv MXB        1.17gm * P<.03      526.mg n.s.s.   3/50    6/50   12/50                                          liv:hpa,hpc,nnd.
2790 R m f34 eat 95w95 1823                          0    800.mg                                           Rao;carc,8,1347-1350;1987
 liv mix er     499.mg   P<.003  +  193.mg 2.61gm   0/8     6/10
 liv hpc er     895.mg   P<.02      303.mg n.s.s.   0/8     4/10
 liv hpn er     2.05gm   P<.2       501.mg n.s.s.   0/8     2/10
2791 R m f34 eat 25m25 1982                          0    800.mg                                              Rao;jtxe,30,85-89;1990
 liv mix er     412.mg   P<.0005 +  178.mg 1.59gm   1/10   11/14
2792 R m f34 eat 78w79 2442m                         0    98.7mg  494.mg                             David;faat,50,195-205;1999/2000
 liv mix Cek    360.mg * P<.03   +  126.mg n.s.s.   1/10    1/10    5/10
 liv hpc Cek    560.mg * P<.05      171.mg n.s.s.   1/10    0/10    4/10
2793 R m f34 eat 18m24 2442n                         0    371.mg
 liv mix Cer    769.mg   P<.0005 +  405.mg 2.24gm   4/70   18/55
 liv hpa Cer    1.39gm   P<.008     606.mg 31.8gm   4/70   12/55
 liv hpc Cer    1.91gm   P<.002     823.mg 6.76gm   0/70    7/55
2794 R m f34 eat 24m24 2442o                         0    3.96mg  19.8mg  99.0mg  495.mg
 liv mix Ce     725.mg * P<.0005 +  444.mg 1.43gm   4/70    5/50    4/55   10/55   29/70
 liv hpc Ce     1.05gm * P<.0005    644.mg 1.88gm   0/70    0/50    1/55    3/55   20/70
 liv hpa Ce     1.28gm * P<.0005    686.mg 3.67gm   4/70    5/50    3/55    7/55   20/70
 pan ana e      3.91gm   P<.008     1.48gm 70.5gm   0/60                            5/59
 --- mnl e      1.36gm * P<.04      539.mg n.s.s.  15/65   13/50   16/55   32/65   27/65
2795 R m f3d eat 52w52 2161m                         0    800.mg                                      Hayashi;carc,15,2215-2219;1994
 liv mix ekr    no dre   P=1.       412.mg n.s.s.   0/10    0/10
2796 R m f3d eat 78w78 2161n                         0    800.mg
 liv mix er     551.mg   P<.03   +  162.mg n.s.s.   0/8     3/7

Mutagenicity in Salmonella: negative
SMILES Code for di(2-Ethylhexyl)phthalate: O=C(C1=C(C=CC=C1)C(=O)OCC(CCCC)CC)OCC(CCCC)CC
InChI Code for di(2-Ethylhexyl)phthalate: InChI=1/C24H38O4/c1-5-9-13-19(7-3)17-27-23(25)21-15-11-12-16-22(21)24(26)28-18-20(8-4)14-10-6-2/h11-12,15-16,19-20H,5-10,13-14,17-18H2,1-4H3
Source for SMILES and InChI: USEPA Distributed Structure-Searchable Toxicity (DSSTox) Database

Chemical Structure for di(2-Ethylhexyl)phthalate:

Source for structure: National Library of Medicine ChemIDPlus

See full CPDB Summary Table on 1547 chemicals. See Full CPDB for all results on 6540 experiments of 1547 chemicals.

A complete list of CPDB chemicals, which is searchable by name or by CAS number, is available here.

For a compendium of CPDB results organized by target organ, which lists all chemicals in each species that induced tumors in each of 35 organs, see Summary Table by Target Organ.

The CPDB is available in several formats that permit printing and downloading into spreadsheets and statistical databases.

A plot of the CPDB presents results of 1547 experiments on 6540 chemicals in an easily readable format that has been used in publications of the CPDB.
A Screen version plot for use on a single computer screen, with the same data.
Excel version of the same data.
Tab-separated versions of the same data, which can be easily read into databases.

A Supplementary Dataset gives details on dosing and survival for each experiment.

Relatively precise estimates of the lower confidence limit on the TD₁₀ (LTD₁₀) are readily calculated from the TD₅₀ and its lower confidence limit, which are reported in the CPDB. For researchers and regulatory agencies interested in LTD₁₀ values, we provide them in an Excel spreadsheet.

PDF versions of our publications of analyses using the CPDB are available, organized by year and by research topic.

Carcinogenic Potency Database Project (CPDB) Home Page
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Last updated: October 3, 2007