Synthetic Food Dye Risk Assessment

At the request of the California Legislature, OEHHA is conducting a risk assessment of the potential impacts of synthetic food dyes on children, particularly for neurobehavioral and other neurologic effects. OEHHA plans to include the following food dyes in its assessment:

FD&C Blue No. 1

CAS 3844-45-9

FD&C Blue No. 2

CAS 860-22-0

FD&C Green No.3

CAS 2353-45-9

Orange B

CAS 53060-70-1

Citrus Red No. 2

CAS 6358-53-8

FD&C Red No. 3

CAS 16423-68-0

FD&C Red No. 40

CAS 25956-17-6

FD&C Yellow No. 5

CAS 1934-21-0

FD&C Yellow No. 6

CAS 2783-94-0


In conducting this risk assessment, OEHHA plans to evaluate the toxicology, epidemiology, clinical, and exposure literature and databases. OEHHA is planning a symposium on the neurological and neurobehavioral impacts of synthetic food dyes in Summer/Fall 2019. As with OEHHA’s other risk assessment processes, this assessment would include a public review period and scientific peer review.    

For information about the OEHHA’s Synthetic Food Dye Risk Assessment, please contact Sam Delson at (916) 324-0955 or

For updates on this study please visit this webpage.

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