Active material in liquid detergent

In liquid dishwash detergent when I came to calculate the % of active material , I calculate the % of sulfonic acid alone or with the amount of soda it need to neutralize 
( is soda is considered as active material when it neutral the acid or not) 
Any example please?


  • Chemist77Chemist77 Member, PCF student
    Active matter in such cases refer to the active surfactant matter, now you decide.
  • Thanks my Friend I really know this but some people say that soda is consider as active matter as it use to neutralize the acid is this true or not
    This is my question
  • Chemist77Chemist77 Member, PCF student
    Quote those people here,  don't go by hearsay. 
  • The sulphonic acid as alkyl benzene sulfonate is neutalized with sodium hydroxide (or another base) in--situ while formulating into dishwashing products; so what you refer to as soda is sodium which is included in the active component ie sodium alkylbenzene sulfonate.
  • @DRBOB@VERDIENT.BIZ thank my friend 
    Yes I mean soda is any base such NaOH 
    here I mean when I came to calculate the % active material assume that I make total batch of 100 kg dishwasher I use 10 kg alkyl benzene sulfonate with concentration of 85% and need 1.8 kg custic NaOH with concentration of 99% here what you caculate only 
    10kg or both 10kg with 1.8 kg 
    This is an example 
  • Your real  concentration expressed as sodium ABS is 10 x 0.85 + 1.8 = 10.3 kg/100kg  which is 10.3%. Your sulphonic acid conc is low at 85%.As I recall even via Oleum should be >90%  and  via SO3 even higher unless your supplier is using chlorosulphonic acid.
  • Chemist77Chemist77 Member, PCF student
    @DRBOB@VERDIENT.BIZ can you elaborate the last sentence please, is it about the source of ABS origin. Will be great to hear from you. 
    @Chemist_Ahmed is it the LABSA that you are using with 96% purity?? 
  • Chemist77  I was trying to understand through process how SA is so low ie 85%, Most if not all  LAS is made via oleum or SO3 with conversions of alkyl benzene to sulphonic acid of 98--99% so most products marketed are 96% active with 2% free oil (as alkyl benzene).Supplier could be using a process I am not not familiar with (doubtful) or there is a mistake on Cof A/analysis.All of the foregoing relate to the source of the ABS.
  • Chemist77Chemist77 Member, PCF student
    @DRBOB@VERDIENT.BIZ thank you, makes easier to understand. As you said i have seen 96% all this time and that's about it. 
    I'm very happy to talk with both of you my friends and I really found the answer thank a lot .
    About you ask me about the purity of LABAS ,here in Egypt the suppliers are made this with variety of purity and may be reach to 60% 
    We have here three classes of ABS 
    First is called cloudy ABS with low low low purity 
    2nd is called colourless and the purity of it is between 75% to 85% 
    3rd is called Gaseous and the purity of it is 96% 
    Here in Egypt most of us use the 2nd kind of ABS that 1 kg neutralize with NaOH 180 gram 
    This is what I know and I don't know about the process to make ABS 

  • Chemist77Chemist77 Member, PCF student
    Eventually you need to decide the final pH and that is the final step. I have seen few with as low as 5.5 going upto 8.5 and if I am using LABSA I would prefer pH on higher side. Add an amine oxide, I wouldn’t mind a small throw in of SLES as well. I do that in mine and my benchmark is Fairy. 
  • @Chemist77 sorry can't understand what you mean my friend 
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