Dodecylbenzene sulfonated acid and food safety (mid level chemistry question) - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Dodecylbenzene sulfonated acid and food safety (mid level chemistry question)

Reply
 
Thread Tools
Old 04-02-2013, 12:49 AM   #1
Walking_Target
Recipes 
 
Sep 2011
Peterborough, ON
Posts: 228
Liked 12 Times on 11 Posts



I'm thinking of switching to Star-San as my go-to cleaner. I really like the idea of the no-rinse, guaranteed foamy sanitation that it offers.

The part that bugs me is the large portion of the dodecylbenzene sulfonate.

Chemically speaking, I know it has the potential to break down into perfectly harmless compounds which can be used by yeast as food.

But I'm not able to find any kind of decomposition or breakdown for this compound. The worrying thing is that I could see how the benzene ring could be left intact, and well, benzene really isn't good for you.

Any smarter chemists out there that could put my mind at ease?
__________________
Fermenting - Pomegranate Mead (3g), Acerglyn

Kegged - Modified Bee Cave IPA, Calypso Pale

Bottled - Brown ale, Pomegranate Mead, Orange Apfelwein

 
Reply With Quote
Old 04-02-2013, 01:05 AM   #2
edds5p0
Recipes 
 
Sep 2012
Posts: 375
Liked 55 Times on 48 Posts


Quote:
Originally Posted by Walking_Target
I'm thinking of switching to Star-San as my go-to cleaner. I really like the idea of the no-rinse, guaranteed foamy sanitation that it offers.

The part that bugs me is the large portion of the dodecylbenzene sulfonate.

Chemically speaking, I know it has the potential to break down into perfectly harmless compounds which can be used by yeast as food.

But I'm not able to find any kind of decomposition or breakdown for this compound. The worrying thing is that I could see how the benzene ring could be left intact, and well, benzene really isn't good for you.

Any smarter chemists out there that could put my mind at ease?
I don't see any way the sulfate group will part ways with the benzene ring. Benzene is carcinogenic because it fits nicely between base pairs in DNA (intercalating agent). The sulfate group should make it too bulky to cause problems.

 
Reply With Quote
Old 04-04-2013, 03:03 AM   #3
alien
Recipes 
 
Apr 2012
Philadelphia, PA
Posts: 1,235
Liked 68 Times on 59 Posts


It is a typical anionic detergent. I think you can assume that it is pretty safe, given that several million tons of it are manufactured each year largely for household purposes.

The Merck Index doesn't say much about it, except that the LD50 in mice is 2g/kg orally. Way more than you'd ever be exposed to so not scary.

According to this document, there is no evidence that it is a carcinogen in rodents. The primary degradation intermediates are sulfophenyl carboxylates (SPCs), which further degrade to CO2, sulphate, and water - all pretty harmless.

http://www.chem.unep.ch/irptc/sids/oecdsids/las.pdf

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Food safety of steeping bags, copper and solder Juul Beginners Beer Brewing Forum 31 10-06-2013 06:20 AM
Question: Alpha acid chemistry forces Brew Science 12 07-25-2012 02:25 PM
Liquid Level Float for Heating Element(Safety) zeus53219 For Sale 2 06-09-2012 09:57 AM
Using a PH meter to determine home grown hops acid level? Hermit Brew Science 8 01-16-2012 06:29 PM
Food Safety Modernization Act of 2009... beergears General Chit Chat 12 04-02-2009 05:04 PM


Forum Jump