fusso
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Another potential phthalate source?
Some brands of erasers also contain phthalate plasticizers. Are they good sources of phthalate? Will the rubber react with NaOH to form some difficult
to separate side products?
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VSEPR_VOID
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Could you provide a source? What kind of erasers?
This is what I found but it is very outdated.
https://patents.google.com/patent/US2404322A/en
[Edited on 27-5-2018 by VSEPR_VOID]
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DavidJR
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Phthalic anhydride and phthalic acid are difficult to find, but potassium hydrogen phthalate ("KHP") is relatively easy to get (primarily used for
buffer solutions). From that it's easy enough to get the acid and then anhydride.
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fusso
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You mean news articles like this?
https://www.consumer.org.hk/ws_en/news/press/480/erasers.htm...
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battoussai114
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Most regulatory agencies either downright ban phtalate plasticizers for products catered to children or set very low permissible concentrations (less
than 0,1% weight in the US for instance)
Definitely not a good source unless you own a eraser recycling plant... heck, even then it would probably not be worth it.
Batoussai.
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VSEPR_VOID
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https://www.ebay.com/itm/HiMedia-GRM3939-500G-Potassium-Hydr...
That is not a bad price.
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Outer
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Quote: Originally posted by fusso  | Some brands of erasers also contain phthalate plasticizers. Are they good sources of phthalate? Will the rubber react with NaOH to form some difficult
to separate side products?
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Common PET bottles must be much better sources of phthalates.
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fusso
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| Quote: Originally posted by Outer | | Quote: Originally posted by fusso | Some brands of erasers also contain phthalate plasticizers. Are they good sources of phthalate? Will the rubber react with NaOH to form some difficult
to separate side products?
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Common PET bottles must be much better sources of phthalates. |
Thats terephthalate
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repogreg
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what are the illicit uses that make it "banned" just curious
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Pumukli
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Nothing illicit, o-phthalates are oestrogen-mimetic (or simply "just" endocrine disruptors) and are probably (one) cause of the world turning more and
more "feminine". They can lead to decreased sperm count from frogs to humans and cause male-sterility.
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repogreg
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phthalic anhydride
phthalic anhydride and phallamide are both on amazon and ebay under 50$ for 500 grams
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Texium
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Thread Moved
13-6-2018 at 09:10 |
Bert
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Mood: " I think we are all going to die. I think that love is an illusion. We are flawed, my darling".
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Plasticizers- You want plasticizers?
[Edited on 6-13-2018 by Bert]
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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chemplayer...
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Diethylphthalate is available in many parts of the world in an ethanol solution as a cheap (and very old school) insect repellent lotion. Distill off
the ethanol, hydrolyse the ester with excess NaOH (caution not to 'half-hydrolyse it') and then acidify to get the phthalic acid. Home chemistry is
definitely a much better use for this product than repelling insects (and exposing yourself to large phthalate doses in the process!).
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