Dive Summary:

• The Chanler Group, an environmental law firm, has filed a lawsuit against McCormick & Company, Farmer Bros and Adams Extract & Spice stating that all three companies failed to comply with Prop 65.
• Prop 65 maintains that foods or products with known carcinogenic substances must be labeled thusly in the state of California.
• The Chanler group has claimed all three of these companies have products which contain the carcinogenic chemical 4-MEI, or 4-Methylimidazole, without any mention on their packaging. 

From the article:

The Chanler Group had previously issued 60-day notices of violation, urging the manufacturers to comply with California's Proposition 65 requirements. The state law calls for manufacturers and retailers to label products containing known carcinogenic toxins with a warning to inform consumers prior to exposure.