CAS Number: 116-31-4
Chemical Formula: C₂₀H₂₈O
Active Marker Content: HPLC检测纯度最低98%（CAS 116-31-4，C20H28O，分子量284.44）。
IUPAC Name: (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraenal
EC Number: 204-135-8
Molecular Weight: 284.4
Standardization Level: 视黄醛（维生素A醛），通过β-胡萝卜素氧化裂解制得的氧化型视黄醇衍生物；熔点61-63°C。
Foreign Matter: 以黄色结晶或粉末形式供应，符合高纯度（≥98%）规格。

其他信息

补充描述:

All-trans-Retinal (Retinaldehyde, RAL), also called vitamin A aldehyde, is an oxidized retinol derivative (CAS 116-31-4, C20H28O, MW 284.44, melting point 61-63°C) produced via oxidative cleavage of beta-carotene, which is then reduced to retinol and oxidized to retinoic acid. Supplied as yellow crystals or powder at minimum 98% purity by HPLC, it serves as an intermediate metabolite of natural retinoic acid with similar bioactivity but significantly better skin tolerance — retinoic acid's broad dermatological uses have been limited by the local irritation that retinal avoids.

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