MEGUIAR'S MC203 User Manual
Page 11

MC203, Motorcycle Leather Cleaner/Conditioner (20-175A): MC20306
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Page: 11 of 17
isothiazol-3-
one and 2-
methyl-2H-
isothiazol-3-
one
Mixture of 5-
chloro-2-
methyl-2H-
isothiazol-3-
one and 2-
methyl-2H-
isothiazol-3-
one
55965-84-9
Rainbow trout Experimental
96 hours
LC50
0.07 mg/l
2-
benzylidenehe
ptanal
122-40-7
Ricefish
Experimental
96 hours
LC50
0.91 mg/l
2-
benzylidenehe
ptanal
122-40-7
Water flea
Experimental
48 hours
EC50
0.28 mg/l
2-
benzylidenehe
ptanal
122-40-7
Green Algae
Experimental
72 hours
EC50
2.3 mg/l
Isothymol
499-75-2
Fathead
minnow
Estimated
96 hours
LC50
3.1 mg/l
Paraffin Wax
8002-74-2
Green algae
Experimental
96 hours
EC50
>1,000 mg/l
Paraffin Wax
8002-74-2
Water flea
Experimental
48 hours
EC50
>10,000 mg/l
Paraffin Wax
8002-74-2
Rainbow trout Experimental
96 hours
LC50
>1,000 mg/l
PEG Stearate
9004-99-3
Green algae
Estimated
72 hours
EC50
0.64 mg/l
PEG Stearate
9004-99-3
Water flea
Estimated
48 hours
EC50
0.72 mg/l
PEG Stearate
9004-99-3
Zebra Fish
Estimated
96 hours
LC50
0.65 mg/l
Petrolatum
8009-03-8
Rainbow trout Estimated
96 hours
LC50
>1,000 mg/l
Stearic Acid
57-11-4
Ricefish
Laboratory
96 hours
LC50
125 mg/l
Triethanolamin
e
102-71-6
Green algae
Experimental
72 hours
EC50
216 mg/l
Triethanolamin
e
102-71-6
Water flea
Experimental
48 hours
EC50
609.98 mg/l
Triethanolamin
e
102-71-6
Goldfish
Experimental
24 hours
LC50
5,000 mg/l
Non-
Hazardous
Ingredients
Mixture
Field
LC50
>1,001 mg/l
Zinc oxide
1314-13-2
Chinook
Salmon
Experimental
96 hours
LC50
0.23 mg/l
Zinc oxide
1314-13-2
Water flea
Experimental
48 hours
EC50
3.2 mg/l
Zinc oxide
1314-13-2
Green Algae
Experimental
72 hours
EC50
0.046 mg/l
Mixture of 5-
chloro-2-
methyl-2H-
isothiazol-3-
one and 2-
methyl-2H-
isothiazol-3-
one
55965-84-9
Water flea
Experimental
21 days
NOEC
0.172 mg/l
2-
122-40-7
Green Algae
Experimental
72 hours
NOEC
0.21 mg/l