I know this is an old post but I was doing some research after having foaming problems with Liquid Lightning in my cell. I came across a few different brands online of Sulfuric Acid. If anyone has experience with any of these, please chime in. Here is a short list of what I've found so far:
1. Name - Zep-Flo Drain Solvent. MSDS sheet says > %90 Sulfuric Acid. Specific Gravity = 1.83. I've bought Zep Hydrochloric Acid Toilet Bowl Cleaner at Home Depot but didn't use it since it was blue in color. I haven't looked to see if they have this Zep product. I haven't tried to order through Zepcommercial.com yet so they may require you to be a business.
2. Name - Tempered Sulfuric Acid Drain Opener. MSDS sheet says %86. Specific Gravity = 1.775. Again, not sure if you have to be a business to acquire this stuff but Venus Labs in Huntington Beach, CA has it, and BioChem Inc. in Salt Lake City, UT
@cleaners-degreasers.com. The best thing about this one is, they describe it as the safest Sulfuric Acid based cleaner out of any. If you accidentally get some on you, you have about a minute to apply water where as most other Sulfuric Acid based drain cleaners instantly start burning your skin. But it is tempered, inhibited, and black in color. :|
3. Name - Zep Professional Sulfuric Acid Drain Opener. MSDS sheet says %60-100 by weight. SG = 1.836. Same situation as Zep-Flo above. You may have to be a business to purchase through Zepcommercial.com.
4. Name - Drain Power. MSDS sheet doesn't give percent by weight but with an SG of 1.84, it's over %90. Manufactured by Alliance in Manufacturing, LLC. St. Louis, Missouri. @ aim-alliance.com. This one looks like you'll definitely need to own a business to purchase this stuff, if you visit that website, but....Walmart.com shows one called Drain Power Professional Strength Drain Opener. I'll have to look into this. They don't give an MSDS for the brand Walmart sells.
5. Name - Kleen-Out. Available at Menards. %93 virgin Sulfuric Acid Drain Opener according to the description on Menards website but no MSDS to verify. 32oz bottle ~~ $6.98. Unfortunately for me, there are no Menards here in WV.
6. Name - Busters Sulfuric Acid Drain Opener. MSDS sheet %93. SG = 1.83 Red Translucent Liquid. @hdsupplysolutions.com has 32oz case of 12 for $59.99 with Free Shipping to the lower 48. This appears to be a great deal, if you're not required to be a business to do business with them.
7. Name - Clean Shot Sulfuric Acid Drain Opener manufactured by TheoChem. Available at Lowes. %93 inhibited virgin sulfuric acid. No MSDS found. Online price shows 32oz @ $9.98.
I may give the Clean Shot a try. I just hope it doesn't have a foaming problem like Liquid Fire or Liquid Lightning.