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Methyl cyclopentadienyl manganese tricarbonyl (referred to as MMT), by product composition, use and application of the environment is divided into SIGMA-98 type and two Sigma-62 type. The physical and chemical indicators of MMT in the table below -1.

Table -1 Physical and chemical indicators of MMT products

Item	Sigma-98 type	Sigma-62 type
Color	Orange oily liquid	Orange oily liquid
Density (20 °C), g / ml	1.35-1.38	1.10-1.12
Manganese content (weight%)	≥ 24.4	≥ 15.1
Flash Point, °C	≥ 80	≥ 40
Solidifying point, °C	≤ -1	≤ -22
Solubility	With gasoline, toluene immiscible, insoluble in water	With gasoline, toluene immiscible, insoluble in water
Moisture, mg / kg	≤ 200	≤ 200
Methyl cyclopentadienyl manganese tricarbonyl quality base percentage%	≥ 98%	≥ 62%

MMT/Orange oily liquid/Good quality/Methylcyclopentadiene manganese tricarbonyl