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HomeShopIngredients for PerfumeryLiquids Hydroxycitronellal 75% / 25%
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Hydroxycitronellal 75% / 25%

LIQUID 
Rated 5.00 out of 5 based on 1 customer rating
(1 customer review)

£9.00 – £123.00

CAS No. 107-75-5, 107-74-4

Odour (decreasing): Floral-muguet, fresh, green, sweet

Solvent: -none added.

This product is Hydroxycitronellal stabilised with 25% Hydroxycitronellol – the odour is virtually identical with that of the pure material but as the aldehyde forms a hemi-acetal with it’s corresponding alcohol it is much more stable.  There is some beneficial fixation effect from the alcohol as well.

This product is included in the following Perfume Making Kit: 100 Essential Aroma Chemicals Kit Three

See below for more description.

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SKU: 2843 Categories: Aroma Chemicals, Ingredients for Perfumery, Liquids, Molecules Tags: floral, fresh, green, lily of the valley, muguet, sweet
  • Description
  • Documentation
Description

Description and usage notes:

Sweet floral perfume-like notes with green citrus and melon undertones, regarded by most perfumers as the closest one-molecule match to the scent of lily of the valley flowers.  A more detailed description of the odour character and uses of this aldehyde is offered in the entry for the pure material.

NOTE: offered here with the addition of 25% hydroxycitronellol to stabilise the aldehyde avoiding problems with oxidation that are otherwise significant.  Blending of the two materials is done by Pell Wall and this is the form in which hydroxycitronellal is used in our own work.

The odour profile is almost identical with hydroxycitronellal alone with some additional fixation; the mixture forms a hemi-acetal as described by Bedoukian:

“ … there are certain limitations to its stability. For this reason, its dimethyl acetal is sometimes employed, although it does not have the power and character of the aldehyde. Another aromatic often used with hydroxycitronellal is its alcohol. The latter has a subdued character but blends well with the aldehyde. A small amount of the alcohol stabilizes the aldehyde, probably through hemiacetal formation.”

and then later in the same chapter:

“When aldehydes are added to alcohols, a reaction often takes place as evidenced by a rise in temperature, changes in refractive indices, and other physical changes which result from the formation of hemiacetals.”

he goes on to explain that as hydroxycitronellal has both aldehyde and alcohol groups it could be forming an internal hemi-acetal, but experimental evidence shows this is not the case.  Finally, he expands and gives details of the proper proportions:

“Aldehydes react with alcohols to form hemiacetals which are much more stable towards oxidation. This property of hydroxycitronellal was taken advantage of in a patent12 which claims that the addition of 25% or more of hydroxycitronellol to hydroxycitronellal produces a hemiacetal which is more stable than the aldehyde alone and has a lily-of-the-valley odor. The manufacture of hydroxycitronellol and its use as a perfume fixative is described in another patent13.”
And for those who may be interested, here are the patents he references with links added by us:
  • 12 – US Patent number 2,265,437, Dec 9, 1941
  • 13 – US Patent number 2,258,132, Oct 7, 1941

 

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1 review for Hydroxycitronellal 75% / 25%

  1. Rated 5 out of 5

    heatherjshilling (verified owner) – November 15, 2016

    So pleased to find this in a stabilised mix! Sourcing both Hydrocycitronellal and Hydroxycitronellol has been a huge challenge, plus i was never certain which ratio would provide the best overall performance, so this product is – quite literally – the perfect solution.

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Hydroxycitronellal 75% / 25%

Rated 5.00 out of 5
£9.00 – £123.00 Select options
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