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Questions about perchlorate and chlorate

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#21 lloyd



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Posted 18 June 2017 - 09:27 AM

One example of a mixture that can become more sensitive with time is Dr. Shimizu's Napthalene black smoke star formula.


It contains chlorate, sulfur, and a large excess of napthalene as fuel.  There's so much fuel in it that it's not even the least-bit sensitive to either impact or friction.


But....napthalene sublimes into the air at STP.  So, after a time, the stars become fuel-poor, and the only primary constituents are chlorate and sulfur -- OOPS!


That's one of those formulae that needs a "best used by date" on it! <grin>



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#22 DesertCatUSN


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Posted 18 June 2017 - 01:30 PM

Thanks! I'll stick with the known recipes. Roger

#23 PeteyPyro



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Posted 03 July 2017 - 03:27 AM

Hi Lloyd. I should have specified those precautions for when I have sulphur of unknown quality, or like 90+- % garden stuff. I don't think it matters much for bp, but H help me if I had any chlorate stars that got near bp with acidic S, tissue paper in between or not..............when I'm in the States (April-October) however, Phil's G,S, has some good prices on very low acid wetable RM sulfur....Duda D. too, in bulk. I still ALWAYS test it, because there have been cases of cheaper sulphur being relabeled as 99.95% pure / acid free. Maybe I'm just a bit paranoid, Lloyd. .. paranoid pyro Petey (clutching my litmus paper) <grin>
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#24 Zippoman


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Posted 08 July 2017 - 08:50 PM

Chlorate is more shock sensitive then perchlorates

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