Re: Oh, by the way
- From: ailuropoda melanoleuca torontonensis <chris.ambidge@xxxxxxxxxxx>
- Date: Thu, 1 May 2008 14:59:48 -0700 (PDT)
[panda in chemical mode][andrew]
trisodium phosphate = dishwasher detergent = TSP, the same stuff they
sell at the hardware store to rilly clean your walls, especially
before painting. they recommend you use rubber gloves, and with good
reason - you don't want to saponify your fingers.
Is that basically the same as old-fashioned washing soda?
no. washing soda is sodium carbonate, Na2CO3 . typical solutions (ie
about 5%) of that will hover pH 9, 10, off the top of my head.
Trisodium phosphate is Na3(PO4), solutions closer to 12 (ie about 100x
more basic). Reasonably concentrated solutions of washing soda are
not going to chew away at your skin. TSP, more caution required.
(that's disodium carbonate. the other common variant is sodium
hydrogen carbonate = baking soda; known confusingly enough as "sodium
bicarbonate" -- so called coz theres twice as much carbonate per
sodium as in washing soda)
chemist by day, panda by night
.
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