• General

  fragrances in bleach

  Posted by Anonymous on October 28, 2014 at 1:32 pm

  I am trying to determine what characteristics I would need to try and develop a fragrance that would have a chance at being stable in bleach. Shhould I develope an alkaline fragrance?  We have a few fragrances we developed for ammonia but I never ran stability on them . So I really have no idea as to the effect the harsh base may have on our fragrances.

  What would be the safest way to run stability on bleach and ammonia?

  IrinaTudor replied 10 years, 2 months ago 2 Members · 3 Replies
• 3 Replies

• 

  chemicalmatt

  Member

  October 28, 2014 at 4:30 pm

  There are many, many more fragrance components stable in ammonia than there are stable in sodium hypochlorite, a stong oxidizer. You really need to run this by your fragrance supplier, else you will be at it a long time.

• 

  Anonymous

  Guest

  October 28, 2014 at 4:53 pm

  i work for the fragrance supplier and this is a proactive project I have taken on with a sales person but I am not sure where to start.

  Also, once I get a fragrance into bleach what kind of stability conditions would I test the final product in?

• 

  IrinaTudor

  Member

  October 30, 2014 at 4:22 am

  Hi @odehn24, for which fragrance supplier do you work? Do you make finished products and/or raw materials or re-sell them? Most fragrance suppliers have a database of raw materials that include specs on stability in bleach. Like this one:

  http://www.givaudan.com/Fragrances/Fragrance+Ingredients/Advanced+Search_hidden

  This is an example of the steps for a bleach stability protocol:

  1. dosing a perfume material under test into the standard unperfumed bleach base and incubating the dosed base at 20°C in a sealed container for seven days;

  2. dividing the bleach base into two portions and adding to each portion 13% sodium perborate tetrahydrate, together with either 10% TAED granules or sodium sulphate (to act as an inert filler in place of TAED)

  3. incubating both test and control bases in sealed containers at 45°C for a further seven days; and

  4. assessing samples of the test and control powders according to a standard triangle test as described in “Manual on Sensory Testing Methods” published by the American Society for Testing and Materials (1969), using a panel of 20 assessors, who are instructed to judge by smell which of the three base samples is the odd one out, the perfume material being designated a bleach-stable perfume component when - the odd one out of three is correctly identified by no more than 9 of the 20 assessors. 

  
  

  And you need to check the lipoxidase-inhibiting capacity of at least 50% or a Raoult Variance Ratio of at least 1.1.

  
  

  hth

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