2,4-Dienals (such as 2,4-decadienal, CAS 25152-84-5, or related isomers) are powerful fatty-aldehydic materials with a characteristic fried-fat, citrus-peel and green-pear character. In dilution they read as oily-citrus and slightly waxy, with a distinct deep-fried or chicken-skin nuance at higher levels. They add lift and a natural, juicy fattiness to citrus and fruity accords.AI · claude-opus-4-7
| Category | Kind | Max % | Notes | Source |
|---|---|---|---|---|
| Category 1 | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 2 | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 3 | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 4 | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 5A | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 5B | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 5C | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 5D | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 6 | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 7A | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 7B | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 8 | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 9 | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 10A | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 10B | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 11A | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 11B | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
| Category 12 | Prohibited | Not permitted | PROHIBITION per IFRA Standard | DOC |
Compliance-support only. Values resolved from the current IFRA corpus; each row cites the document excerpt it came from. Not a substitute for a qualified safety assessor.