Table 3 The parameters for the computation of HQ, HI, RI and CR.

Oral reference dose. RfD oral (mg/kg/day)

0.0005

0.003

0.04

0.7

0.0003

0.024

0.02

0.0014

0.6

0.3

^62,75

Dermal reference dose. Rfd Dermal (mg/kg/day)

0.000025

0.000075

0.012

0.14

0.000021

0.00096

0.0008

0.00042

0.12

0.06

^62,75

Dermal absorption fraction. ABS

0.05

0.025

0.3

0.2

0.07

0.04

0.04

0.3

0.2

0.2

^62,75

Permeability Coefficient. Kp

0.001

0.002

0.001

0.001

0.001

0.001

0.0002

0.0001

0.001

0.0006

^62,75

Oral cancer slope factor. CSFing mg/kg/day

6.1

0.5

0.5

^62,75

Dermal cancer slope factor. CSFder

6100

500

500

^62,75

Toxic response factor. Tr values

30

2

5

1

40

1

5

5

1

1

⁶⁷

Background value ppm. C_bg

0.2

35

55

15,000

0.8

600

20

12.5

350

70

⁷⁶