After synthesizing a specific chemical, varying amounts of by-products, leftover catalysts, unused reagents, and potentially solvents remain. These can make up a significant portion of the immediately post-synthesis product. To create a pure product these adulterants must be removed. Creating a highly pure product (>98%) generally takes multiple passes. The desired product is iteratively isolated and, with each pass, purity is increased. Creating a highly pure product is expensive and can be time consuming. If you believe your client will probably not be testing their products or your clients have little recourse and you do not rely on repeat business, you are not incentivized to spend the extra time and money on increasing the purity of your shipped product.
N.B. The following ignores the intricacies of the brewing process (specifically the volume of a given mass of solute is treated as 0 removing the requirement of adjusting the volume of solvent).
100mg of a 50% pure raw powder has 50mg of the desired chemical. If I know this beforehand, I can use 200mg of our hypothetical 50% pure raw powder per ml and create a solution with a concentration of 100mg/ml of the desired chemical. I noticed some were confused on this point. The fact that mfl Trenbolone Acetate is 53% pure and has a concentration of roughly 85mg/ml suggests to me that MFL probably assumed the purity of their raw product was low and attempted to adjust accordingly.
Some of you might be thinking that simply adjusting the amount of raw accordingly to create the proper concentration of the desired chemical is sufficient. Problem solved, right? The real issue, as I see it, is that you have no idea what the remainder of the raw powder contains. 100 mg of 50% pure trenbolone acetate powder could, theoretically, contain 50mg of arsenic or lsd (goofy examples — not likely). The more likely case is that is contains various by-products present after the synthesis of trenbolone acetate as well as residual catalysts OR the powder could be purposefully "cut" with anything. The problem is that you have no idea and you are going to inject this into your body bypassing many protective mechanisms.
Is testing adulterants (maybe just common or exceptionally dangerous ones) possible? Unfortunately, I am unfamiliar with what the likely by-products are for any given steroid synthesis. I have heard that heavy metal contamination is less likely with steroids unless produced with contaminated reagents or with contaminated equipment / in a contaminated environment (China anyone?).
Is anyone familiar with common adulterants found in UGL gear or found in poorly processed raws from (terrifying) suppliers? Does anyone have a line on how I might find this sort of information?
I have seen some anger directed at various labs. Keep in mind the labs are getting screwed too. They would prefer to get the purest raws possible. Think about it. The thing that should make you angry (but should not surprise you) is that they do not properly test their raws. For example MFL claims to do melting point tests with a capillary tube device. Not a great test. Personally, I assume that they use the deviation from the standard to very roughly determine how much to adjust the quantity of solute to use. Long post. Thanks for reading.