Percentage Formula - Chemists Corner

Formulating

Percentage Formula

Posted by peter on January 30, 2016 at 12:50 pm

Please I need a book or someone to teach me how to calculate percentage formula when using chemicals in formulating.

Thanks,

Peter.

Bobzchemist replied 8 years, 10 months ago 4 Members · 6 Replies
6 Replies

MarkBroussard

Professional Chemist / Formulator
January 30, 2016 at 1:14 pm

@Peter,

It is very simple. All percentages are based on weight, in grams, of ingredients in the mixture:

When you are just learning, it is best to stick to making batches that are units of 100. Let’s assume you make a 100 gram batch …

Water 73.0 grams (72%)

Aloe Vera Powder 0.5 grams (0,5%)

Propanediol 6.0 grams (6.0%)

Glycol Acid 10.0 grams (10.0%

Active Ingredient X 4.0 grams (4.0%)

Active Ingredient Y 6.5 grams (6.5%)

Preservative 1.5 grams (1.5%)

Fragrance 0.5 grams (0.5%)

Total 100.0 grams
OldPerry

Professional Chemist / Formulator
January 30, 2016 at 5:22 pm

I would add that if you have your measurements in volume (say cups or ounces) you need to convert them to grams and then do the % calculation.

To get mass from volume you need to multiply the density of the liquid by the volume.
Bobzchemist

Member
January 31, 2016 at 2:51 pm

https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/percent-intro-pre-alg/v/describing-the-meaning-of-percent 
peter

Member
February 8, 2016 at 9:47 am

It is a great help. Thanks very much to you all.

Peter.
Anonymous

Guest
April 6, 2016 at 7:07 am

Any one tell me in hand wash liquid I use als and Sles and SLS nacl not working. It down viscosity. Why
Bobzchemist

Member
April 6, 2016 at 1:50 pm

Please start a new discussion

Log In to Reply

Log in to reply.