HIGGS BOSSON
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Describe the synthesis technique you used.
Who is the supplier?
In appearance, BK4 powder looks clean. And small amounts of methylpropiophenone should not lead to such results.
Who is the supplier?
In appearance, BK4 powder looks clean. And small amounts of methylpropiophenone should not lead to such results.
Describe the synthesis technique you used.
Who is the supplier?
In appearance, BK4 powder looks clean. And small amounts of methylpropiophenone should not lead to such results.
In him 100 gr bk4 have around 15 ml methylpropiophenon, its not good. And washing in hot water not helped, maybe recristallyzation helps
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G.PattonYou upset me. The methylamine is washed out with high quality, the acid was used less than half of the theoretically required amount, the acid was added very slowly, with acetone it turns out blue shit (he already wrote with a photo in another post). If you take bk4 and melt it, it melts at approximately 56-60 degrees, but the author does not have the technical ability to melt the sample in a capillary as it should be done. But we all know perfectly well that the melt of bk4 in water should sink (for memory 1.4 g/ml), since its density is much higher than water (1 g/ml), and the density of the MP is 0.991 g/ml
w2x3f5
w2x3f54-methylpropiophenone has 238-239 7 °C melting point, BK4 has 75-77 °C melting point. You said that this product has 56-60 °C. Do you understand that it have to melt at higher temperature, not lower?
G.PattonY self checked BK4 has 75-77 °C ? 4-mp 238 its boiling point, you wrong
G.PattonDo you understand that the unpurified product melts lower for everyone? Do you understand that bk4 manufacturers do not purify it and do not recrystallize it
w2x3f5
As you suppose in this case, it is 4-methylpropiophenone. Hence, mp of bk4 have to rise.
G.PattonAnd the last moment, the author used water at 70 degrees (thermostat with a temperature sensor) and everything melted. Even according to your data, there is a problem with bk4
G.PattonMP is a liquid under normal conditions, you write that it melts at 238 degrees
G.PattonBK4 will not rise, the density of its melt is more than 1 gram per milliliter))) your DCM does not rise to the top layer in pure water?)))
w2x3f5Yes, you are right. My bad. Temperature have to down. Anyway, 4-BK may be recrystallized from benzene with slight warm.
G.Pattonno need benzene, for author its hazard, IPA best variant, I think work same great same like with p2np
Why do you think it is 4-methylpropiophenone? @white7proton Have you measured melting point of BK4? In general, I agree with @HIGGS BOSSON . I guess you added too much acid. Have you measured pH while HCl 36% addition? Have you used HCl solution in acetone or added it without solvent. pH is very important and you could overoxydize your 4-MMC by fast addition of full volume HCl. Also, have you washed your 4-mmc free base by water from methylamine excess?
G.Patton
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You upset me. The methylamine is washed out with high quality, the acid was used less than half of the theoretically required amount, the acid was added very slowly, with acetone it turns out blue shit (he already wrote with a photo in another post). If you take bk4 and melt it, it melts at approximately 56-60 degrees, but the author does not have the technical ability to melt the sample in a capillary as it should be done. But we all know perfectly well that the melt of bk4 in water should sink (for memory 1.4 g/ml), since its density is much higher than water (1 g/ml), and the density of the MP is 0.991 g/ml
I guess I can overcome itYou upset me.
G.Patton
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You upset me. The methylamine is washed out with high quality, the acid was used less than half of the theoretically required amount, the acid was added very slowly, with acetone it turns out blue shit (he already wrote with a photo in another post). If you take bk4 and melt it, it melts at approximately 56-60 degrees, but the author does not have the technical ability to melt the sample in a capillary as it should be done. But we all know perfectly well that the melt of bk4 in water should sink (for memory 1.4 g/ml), since its density is much higher than water (1 g/ml), and the density of the MP is 0.991 g/ml
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4-methylpropiophenone has 238-239 °C melting point, BK4 has 75-77 °C melting point. You said that this product has 56-60 °C. Do you understand that it have to melt at higher temperature, not lower?
4-methylpropiophenone has 238-239 °C melting point, BK4 has 75-77 °C melting point. You said that this product has 56-60 °C. Do you understand that it have to melt at higher temperature, not lower?
G.Patton
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Do you understand that the unpurified product melts lower for everyone? Do you understand that bk4 manufacturers do not purify it and do not recrystallize it
It is false. Product can be polluted by substances with higer mp.Do you understand that the unpurified product melts lower for everyone?
I don't know about this product any. As I understand, neither you. You have just assumptions. I would like to continue this discussion with topic author.Do you understand that bk4 manufacturers do not purify it and do not recrystallize it
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It is false. Product can be polluted by substances with higer mp. As you suppose in this case, it is 4-methylpropiophenone. Hence, mp of bk4 have to rise.
I don't know about this product any. As I understand, neither you. You have just assumptions. I would like to continue this discussion with topic author.
It is false. Product can be polluted by substances with higer mp. As you suppose in this case, it is 4-methylpropiophenone. Hence, mp of bk4 have to rise.
I don't know about this product any. As I understand, neither you. You have just assumptions. I would like to continue this discussion with topic author.
It is false. Product can be polluted by substances with higer mp. As you suppose in this case, it is 4-methylpropiophenone. Hence, mp of bk4 have to rise.
I don't know about this product any. As I understand, neither you. You have just assumptions. I would like to continue this discussion with topic author.
G.Patton
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MP is a liquid under normal conditions, you write that it melts at 238 degrees
Yes, you are right. My bad. Temperature have to down. Anyway, 4-BK may be recrystallized from benzene with slight warm.