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Making Slow Dissolving Tablets

Making Slow Dissolving Tablets - Chemistry Forum

Making Slow Dissolving Tablets - Chemistry Forum. Discuss chemical reactions, chemistry.


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  #1  
Old 11-06-2003, 01:53 PM
SQUINTZ
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Default Making Slow Dissolving Tablets



I want to make a Slow Dissolving tablet from household ingredients or
ingredients that are easy to get from a stroe or the internet. I
Currently have a toilet bowl cleaner in powder form and i want to make
it into one of those tablets that you can put in the bank of the
tank(water closet). What do i have to mix together to make something
like this?
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  #2  
Old 11-06-2003, 09:48 PM
Barry Hunt
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Default Making Slow Dissolving Tablets


"SQUINTZ" <[Only registered users see links. ]> wrote in message
news:[Only registered users see links. ] m...

Speaking as a chemist who has worked on this type of product I believe the
answer is NO! "Household ingredients" simply won't give you the
slow-dissolving effect.

Haven't said that I'll be very interested to see if anyone comes up with
some clever ideas - something to make the powder slightly (but not totally)
water-resistant?

Barry Hunt


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  #3  
Old 11-06-2003, 11:01 PM
Steve Turner
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Default Making Slow Dissolving Tablets

[Only registered users see links. ] (SQUINTZ) wrote:


It is not generally possible to change the solubility of a substance
without changing the substance. Therefore your approach would be
mechanical entrainment. You could try pressing the substance, along
with a large amount of insoluble binder, into a dense briquette.
Another approach might be to place the substance into a sealed
container perforated by one or more small holes. The size and
quantity of holes determines how fast the substance diffuses out.

Steve Turner

Real address contains worldnet instead of spamnet
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  #4  
Old 11-07-2003, 12:33 AM
William Penrose
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Default Making Slow Dissolving Tablets

On 6 Nov 2003 05:53:57 -0800, [Only registered users see links. ] (SQUINTZ) wrote:


A plastic bottle with a couple of small holes punched in the side, and
a hole at the top to let air out. Then just let it sit. If there's not
enough cleaner, make more holes.

Bill Penrose

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  #5  
Old 11-08-2003, 06:44 AM
Colthechemist
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Default Making Slow Dissolving Tablets

"Barry Hunt" <[Only registered users see links. ].au> wrote in message news:<boefgv$2vu1$[Only registered users see links. ].au>...

I don't agree at all,Barry. Ever had a packet of automatic dishwasher
powder turn rock hard when stored for a long time? Products of this
type contain silicates and phosphates. Suggest the original poster
experiment by dissolving the diswashing powder in water, together with
some Hydrogen Peroxide to destroy the free chlorine. Add various
amounts of toilet powder, heat to dissolve & cast into moulds. Trial
and errror is definitely need here to establish the optimum
temperature and proportion of the ingredients.

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