P-Hydroxybenzaldehyde (CAS 123-08-0): Quality Sourcing Guide for Flavor and Fragrance Applications

P-Hydroxybenzaldehyde

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The CoA That Passed, The Batch That Failed

A flavor house qualifying a new supplier for ♦P-Hydroxybenzaldehyde (CAS 123-08-0). GC purity: 99.2%. Refractive index: within spec. Color: water-white. Sensory evaluation: failed. The perfumer identified a green, slightly metallic off-note. GC-MS found a trace aldehyde at 0.08% — far below analytical detection threshold, but above the human olfactory threshold.
 
Analytical data and sensory data measure different things. For F&F work, both matter.

What 'High Purity' Actually Means for F&F Compounds

P-Hydroxybenzaldehyde as a raw material for F&F requires at minimum: GC purity with impurity identification, odor description vs. reference, refractive index, specific gravity, and flash point.

Storage and Stability

Aldehydes oxidize. Ketones can polymerize. Both degrade quality over time.
P-Hydroxybenzaldehyde should be stored in tightly sealed containers, away from heat and light, under inert atmosphere for sensitive applications.

sdlookchem's F&F Grade Supply

Shandong Lookchemical Co., Ltd. produces P-Hydroxybenzaldehyde for flavor and fragrance applications with GC purity testing, refractive index, and appearance verification on each batch.
Packaging: amber glass bottles with nitrogen headspace for sensitive applications.
 

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