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Proposition 65

Meeting Synopsis and Slide Presentations Carcinogen Identification Committee Meeting Held on May 29, 2009

A copy of the meeting transcript is available here.

A meeting of the Proposition 65 Carcinogen Identification Committee (CIC) was held on May 29, 2009, at the California Environmental Protection Agency Headquarters Building in Sacramento, California (agenda available).  The committee provided OEHHA with its advice concerning the relative priority of 38 chemicals for possible Hazard Identification material preparation.  The Committee also considered the listing of marijuana smoke as known to the state cause cancer. Following is a summary of that meeting. 

A copy of the Final Hazard Identification Document for Marijuana is avaiable here


The CIC recommended that 9 of the 38 chemicals referred to them for advice and consultation be placed in the ‘high’ priority group, w13 chemicals be placed in the ‘medium’ priority group, and the remaining 16 be placed in the ‘low’ priority group (see table below for specific suggestions concerning chemical priority assignments.)  For more information on the prioritization process for chemicals, please follow this link:  []

Summary of Chemical Prioritizations
High Medium Low
Amphetamine and its salts 11-Aminoundecanoic acid


1,3-Dichloro-2-propanol Aspartame** Anthanthrene
Diisononyl phthalate (DINP)* Dicofol Benoxacor
2,6-Dimethyl-N-nitroso-morpholine Diethanolamine (DEA) 2-Chloro-1,1,1-trifluoroethane
Fluoride and its salts Hydroquinone D & C Yellow #11
Haloperidol Methoxychlor N,N-Diethylthiourea
3-Monochloropropane-1,2-diol (3-MCPD) Methyl ethyl ketoxime 1,3-Dinitropyrene
N-Nitrosohexamethyleneneimine 3-Nitrofluoranthene Ethylnodiol diacetate
Perfluorooctanoic acid (PFOA) and its salts and transformation and degradation precursors N-Nitrosoanabasine Molybdenum trioxide
  Permethrin Nitrofurantoin
  Tetrachlorvinphos 5-Nitro-o-toluidine
  Thiamethoxam Rock wool
  Tris(1,3-dichloro-2-propyl) phosphate (TDCPP) Triamterene
    Triethanolamine (TEA)
    Vinylidene chloride

*The Committee recommended putting DINP towards the bottom of the "High" category depending on exposure considerations. (Meeting transcript reference available here)

**The committee recommended putting aspartame at the bottom of the "medium" category. (Meeting transcript reference available here)


Following a staff presentation, comments from the public and committee discussion the CIC determined that Marijuana Smoke has been clearly shown to cause cancer; and therefore will be added to the Proposition 65 chemical list. 

This is a link to the slide presentations made by staff of the California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) concerning this item on the Agenda.

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