Methylcyclopentadienyl Manganese Tricarbonyl LD50 175 mg/kg Oral Rat LD50 >2000 mg/kg Dermal Rabbit LC50 >2000 ppm (1 hr) Inhalation Rat Additional Toxic Information: None Available 12. ECOLOGICAL INFORMATION ECOTOXICITY Methylcyclopentadienyl Manganese Tricarbonyl (MMT) is toxic to aquatic organisms. May cause long-term adverse Manganese, tricarbonyl methylcyclo-pentadienyl is a dark orange liquid. ... Contact us for MMT MSDS -Material Safety Data Sheet and MMT CAS 12108-13-3 COA-Certificate ... Berryman Products, Inc. MSDS Product Number: 1512 Page 3 of 4 Section 10 – Stability and Reactivity Chemical Stability: Do not expose to light. Methylcyclopentadienyl Manganese Tricarbonyl is photosensitive and decomposes quickly when exposed to light. Methylcyclopentadienyl Manganese Tricarbonyl is a dark orange liquid with a faintly pleasant odor. It is used as a fuel additive to abate smoke and as a gasoline additive in antiknock mixes. REASON FOR CITATION * Methylcyclopentadienyl Manganese Tricarbonyl is on the Hazardous Substance List because it is regulated by Request MSDS / SDS About Bis(methylcyclopentadienyl)magnesium Bis(methyl-n5-cyclopentadienyl)magnesium is one of numerous organo-metallic compounds sold by American Elements under the trade name AE Organo-Metallics™ for uses requiring non-aqueous solubility such as recent solar energy and water treatment applications. Methylcyclopentadienyl manganese tricarbonyl (MMT) This fact sheet is a summary of the Priority Existing Chemical (PEC) report at the time it was assessed and published. CAS No: 12108-13-3. Methylcyclopentadienyl manganese tricarbonyl (MMT) is imported for use as a fuel additive.