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### alpha-isomethyl ionone (90% min.)

### CAS Number: 127-51-5

##### The statistical data we collected from 32 public perfume formulas suggests that the mean dose for alpha-isomethyl ionone (90% min.) is 5.0%. The typical lower limit is 1.9%, and the usual higher limit is 7.2%. The highest amount of alpha-isomethyl ionone (90% min.) we encountered in any single formula is 18%, and the lowest was 0.0018%.

##### Please note that according to the IFRA Standard Category 4, the level of alpha-isomethyl ionone (90% min.) should not exceed 30% of the final product. Assuming that you will be using your formula for an alcoholic perfume at a 10% dilution, this means you should only use alpha-isomethyl ionone (90% min.) at 300% or less of the formula.

Show all IFRA limits

##### Restriction Limits In The Finished Product (IFRA Amendment 49):

##### Category 1

##### 5.4 %

##### Category 2

##### 1.6 %

##### Category 3

##### 32 %

##### Category 4

##### 30 %

##### Category 5A

##### 7.6 %

##### Category 5B

##### 7.6 %

##### Category 5C

##### 7.6 %

##### Category 5D

##### 7.6 %

##### Category 6

##### 18 %

##### Category 7A

##### 61 %

##### Category 7B

##### 61 %

##### Category 8

##### 3.2 %

##### Category 9

##### 59 %

##### Category 10A

##### 100 %

##### Category 10B

##### 100 %

##### Category 11A

##### 100 %

##### Category 11B

##### 100 %

##### Category 12

##### No Restriction

Hide IFRA limits table

###### 0.0018%

###### 1.9%

###### 5.0%

###### 7.2%

###### 18%

###### Min

###### Max

### Aroma Ingredient Usage Statistics

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