Table V.
Dermal reference dose (RfD), dermal average daily dose, and hazard quotient (HQ) by metal and age group
| Metal | RfD* mg/kg-day | Age ≥ 6 to < 11 years
|
Age ≥ 11 to < 16 years
|
Age ≥ 16 to < 19 years
|
Age ≥ 19 years
|
||||
|---|---|---|---|---|---|---|---|---|---|
| Dose mg/kg-day | HQ | Dose mg/kg-day | HQ | Dose mg/kg-day | HQ | Dose mg/kg-day | HQ | ||
| Arsenic | 3.00E-04a | 2.56E-07 | 8.53E-04 | 2.09E-07 | 6.97E-04 | 1.86E-07 | 6.20E-04 | 5.37E-08 | 1.79E-04 |
| Cadmium | 5.00E-05a | 1.00E-09 | 2.00E-05 | 8.21E-10 | 1.64E-05 | 7.30E-10 | 1.46E-05 | 2.10E-10 | 4.21E-06 |
| Chromium | 7.80E-05a | 1.35E-07 | 1.73E-03 | 1.11E-07 | 1.42E-03 | 9.86E-08 | 1.26E-03 | 2.84E-08 | 3.64E-04 |
| Copper | 2.70E-02b | 1.10E-07 | 4.07E-06 | 9.03E-08 | 3.34E-06 | 8.03E-08 | 2.97E-06 | 2.32E-08 | 8.58E-07 |
| Vanadium | 2.60E-04c | 9.02E-07 | 3.47E-03 | 7.39E-07 | 2.84E-03 | 6.57E-07 | 2.53E-03 | 1.89E-07 | 7.29E-04 |
*
Dermal reference doses were derived from the product of the oral reference dose and the gastrointestinal absorption fraction:
a
EPA Integrated Risk Information System chronic oral reference dose
b
EPA Health Effects Assessment Summary Tables chronic oral reference dose
c
Agency for Toxic Substances and Disease Registry Minimal Risk Levels intermediate oral dose.