Crack or cocaine HCl: does the wash remove the cuts?
Cooking cocaine into crack does not clean it. The wash sorts a powder by how well each ingredient dissolves in water, and most of the cuts that matter are no more water-soluble than the cocaine itself, so they come across into the rock along with it. The belief that a rock is automatically the purer form is common, it is the reason people skip testing at that point, and it is the thing worth correcting before anything else.
Cocaine beside benzocaine, procaine and lidocaine on one card. Each stops at its own height, which is how a card tells them apart.
What the two forms actually are
Cocaine hydrochloride is a salt. That is what makes the powder dissolve in water the way it does. Add baking soda and heat and the salt gives up its hydrochloride, leaving cocaine as a free base, which barely dissolves in water at all. That is the whole trick: the base will not stay in the water, so it separates out and sets hard.
The two forms are the same drug. What changes is the melting point, which is what makes the base smokable, and the solubility, which is what makes the separation happen.
Why the cuts travel with it
The separation is not a filter for quality. It is a filter for water solubility, and it keeps whatever fails to dissolve. Several of the common cocaine cuts are sold as hydrochloride salts too, so the same baking soda converts them to their own free bases, which are also poorly soluble in water. They drop out alongside the cocaine.
Phenacetin is worth separating from that group because it works differently. It is not a salt at all, so the baking soda has nothing to act on. It is already a neutral compound that barely dissolves in water, so it simply stays in the solid the whole way through. It was withdrawn as a painkiller in the 1970s over kidney damage and cancer risk, which is why it is the cut people ask about most.
The table below is the short version of what leaves and what stays.
What a baking soda wash removes from cut cocaine, and what it carries over
Ingredient
In the powder
After the wash
Cocaine
Hydrochloride salt
Free base, stays
Levamisole
Hydrochloride salt
Free base, stays
Lidocaine, procaine, benzocaine
Salt or weak base
Free base, stays
Phenacetin
Neutral, not a salt
Unchanged, stays
Lactose, mannitol, inositol
Sugars, very water-soluble
Largely washes away
Caffeine
Moderately water-soluble
Partly washes away
Read the right-hand column and the pattern is clear. The wash takes out the cheap bulking sugars and leaves behind the pharmacologically active cuts, which is the opposite of the order most people would choose.
The scene already has a name for it
People who smoke crack noticed this long before anyone wrote it down. On r/cracksmokers the cuts that survive the wash get called magic, and the threads asking what magic actually is keep landing on the same two answers: phenacetin and levamisole. There is a whole discussion thread dedicated to spotting it, written by someone who worked out that their local supply had it before they knew what it was called.
Magic is a street name rather than a compound, so it cannot be looked up and it does not mean the same thing in every city. What is worth taking from it is that the observation is sound. Something does come through the wash, people can feel it, and they built a word for it because no one was handing them lab results. A testing card is the part that turns the word into a list of what is actually in the rock.
The weight loss that fools people
A gram of cocaine hydrochloride contains about 0.89 grams of cocaine base, because the chloride is roughly 11 percent of the weight of the salt. Convert a perfectly clean gram and you still get back about 0.89 grams.
So a loss of around a tenth is what the chemistry predicts on its own, with nothing removed. People read that drop as proof that cuts came out. It is not evidence of anything except that the chloride left. A much larger loss usually means sugars were present, or that some of the product went down the sink, which is the same trap covered in spotting a filler.
Why levamisole is the one to care about
Of everything that survives the wash, levamisole is the reason this matters rather than a chemistry curiosity. It is a veterinary antiparasitic that turns up in European cocaine constantly, and in a minority of people it suppresses the production of white blood cells, which leaves them unable to fight ordinary infections. It has no taste and no smell at these amounts, and it carries into a rock as readily as it sits in a powder.
The practical consequence is short. If the powder had levamisole in it, assume the rock does too, and do not treat the wash as a reason to skip a test.
Testing the two forms
Reagents are built and photographed on powder, and a rock is not powder. SCOTT is the cocaine-specific one, and on crack it does not always give the reaction people expect. We are not going to pretend we know exactly why yet. The likely reason is solubility, since the first stage of the test relies on the sample going into an aqueous reagent and the free base barely dissolves in water, but that is a reasonable explanation rather than a settled one.
The practical reading is that a weak or absent SCOTT result on a rock is not proof the rock is not cocaine. If you want identity confirmed on crack, treat a single reagent result as provisional and confirm it by separating the sample on a testing card, which does not depend on that first dissolving step in the same way.
Two practical differences are worth knowing. Take a smaller scraping from a rock, because a dense fragment carries more material than the same looking amount of powder and oversaturates the result. And for a testing card the sample has to go into solution first, which a rock does more slowly than a powder, so give it longer and crush it finer rather than adding more.
For identity on a single sample, the first link below. The second answers what else is in there, which is the question this article is really about, and the third adds a rough percentage alongside it.
Crack is thinly represented in the European lab data. Of 19,119 published results, four are labelled as crack or freebase, and only two of those carry a number: one at 60 percent and one at 88 percent cocaine.
Four samples is too few to describe a market, and it is worth saying that rather than building an argument on it. What the 60 percent result does show is that a rock is not automatically clean. Something made up the other 40 percent of it.
Not by default. It is a different form of the same drug, and the wash removes water-soluble fillers while keeping levamisole, the caines and phenacetin. A rock can be cleaner than the powder it came from, or barely different.
Does a reagent work on a rock?
Not as dependably as on powder. SCOTT in particular does not always react on crack, and the reason is not settled, though solubility is the likely one. Take a small scraping, and treat a weak result as inconclusive rather than negative.
I lost weight washing it. Were those the cuts?
About a tenth of the weight is the chloride leaving and is expected even from clean material. Losing much more than that means fillers were there, or that product was lost in the process.
Does washing remove levamisole?
No, and this is the practical point of the whole article. Levamisole converts to its own free base under the same conditions and comes across with the cocaine.
What is magic?
It is what people smoking crack call the cuts that survive the wash, and the answers usually point at phenacetin and levamisole. It is a street word, not a defined substance, so the only way to know what is in your own rock is to separate it on a card.
Can a testing card read a rock?
Yes, once it is dissolved. Crush it finer and allow more time rather than increasing the amount, which is the usual cause of an unreadable card.
No test result can tell you a substance is safe. No substance is 100% safe.This article is published for harm reduction purposes. It does not encourage the use of psychoactive substances and does not replace medical advice.
