RNKL808
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Looking for Dichloromethane
I am looking for Dichloromethane from a source or someone who is willing to ship to Hawaii. Please let me know if you know of anyone or any place that
would ship here. Any help would be greatly appreciated. Thank you
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BromicAcid
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I think the last holdout in OTC DCM was in anti-spatter spray for welding. I know they have put the ban hammer down on the stuff but at least
according to the first amazon listing it's still around. If you don't need liters of the stuff that could be an option.
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yobbo II
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Car accesory shops or car paint stores have it as professional paint remover
Like old nitromores.
May have to distill.
This is UK
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j_sum1
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Can you make do with chloroform?
That, at least, you can make.
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RNKL808
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I need like two liters dcm. I can make do with chloroform but I end up with extremely low yields when I use pool chlorinating liquid and acetone.
It’s 10% sodium hypochlorite but I think my ratio to acetone is incorrect because I’m constantly ending up with basically nothing. If someone
could help me with the ratio or help me find dcm it would help greatly.
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Sir_Gawain
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It’s not just proportions, you also have to keep the temp really low or it will all boil away. You might want to check the concentration of your
bleach, then use a slight excess.
[Edited on 5-24-2025 by Sir_Gawain]
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j_sum1
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Yes. Yield is low. In absolute terms.
Often the bleach concentration is well below the label value because of decomposition. Titrate first. Then you need the bleach in excess because
acetone contaminates the product. Also bear in mind that some of the product remains dissolved in water and that NaOH present in the bleach and as a
byproduct will destroy chloroform. And on top of that, even at 100% yield you get very small amounts. Such is the nature of chloroform density and the
initial bleach concentration.
But it is possible. I recently reacted 20L of "12.5%" bleach in 2.5L batches. Stretching this out to 2L of product might be a challenge though.
Extra note.
If your bleach says "% available chlorine" this does not refer to the concentration of hypochlorite. Instead it means the mass quantity of Cl2 if it
is reacted with HCl. Do the math. Actual hypochlorite concentration will be less. (About half from memory.) And then expect 30% to 50% loss per year
of shelf life. Like I said, titrate to find out what you really have.
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BromicAcid
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2L so like 4-5 cans of the anti-spatter spray.
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j_sum1
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I believe Hawaii removed all products containing DCM from the shelves about a decade ago. This problem has come up before.
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charley1957
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You may get lucky like I did. I found an ACE hardware store that had several old dusty cans of a stripper containing DCM. Apparently whoever was
tasked with removing the stuff never noticed them, or maybe ACE just didn’t get the memo about DCM. Look around for old lumber yards or mom and pop
hardware stores, you might just get lucky. The big box stores will be no help, but you just might find a gem or two in the old small stores that are
still around. There might be some old mom and pop paint stores around that could have it too.
[Edited on May05-25-2025 by charley1957]
You can’t claim you drank all day if you didn’t start early in the morning.
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