Element

Al

Fe

Ti

Ag

As

Ba

Cd

Co

Cr

Cu

Mn

Ni

Pb

Zn

Refs.

Recommended limits

(Concn. µg/g)

-

-

-

-

3

-

3

-

-

-

-

-

10

-

[16]

-

-

-

-

-

-

5

-

-

-

-

-

20

-

[2]

-

-

-

-

-

-

banned

banned

banned

-

-

banned

banned

-

[18]

-

-

As TiO₂

25%

-

banned

banned

banned

-

banned

-

-

-

banned

-

[19]

-

-

-

-

-

-

-

170

170

-

-

170

20

-

[17]

Toxicity

vomiting, dizziness, nausea, anorexia, headache, weight loss

skin manifestations, visceral cancers, vascular disease

kidney damages, renal disorder, human carcinogen

carcinogen, lungs problem, vomiting and nausea, vision, heart ailments

headache, diarrhea, nausea, vomiting, carcinogenic

Liver damage, Wilson disease, insomnia

dermatitis, nausea, chronic asthma, coughing, human carcinogen

fetal brain damage, kidney disease, circulatory system, nervous system, and autoimmunity problems

depression, lethargy, neurological problems, increased thirst

[10] [23]