Pharmaceutical & API

Chlorocyanopyridines are a family of isomers that share a molecular formula, a nominal mass and, to a first approximation, a catalogue entry. There are several commercially available members, they are all C6H3ClN2 at 138.55, and they cost roughly the same per kilogram. Choosing the wrong one is therefore not a cost error but a chemistry

2-Chloro-3-cyanopyridine (CAS 6602-54-6) is one of the most useful small heterocyclic building blocks in the catalogue, and one of the most frequently mis-ordered. The molecule carries two functional groups on adjacent ring positions, and their arrangement is what makes it valuable: the chlorine sits ortho to the ring nitrogen, which means it is displaced by

A certificate of analysis for hordenine hydrochloride looks simple: half a dozen lines, a lot number, an authorised signature. In practice those lines contain three separate traps. The assay may be quoted on the salt or on the base, on an as-is or a dry basis; the moisture line is both a quality attribute and

The phenethylamine alkaloids are a family in which small structural changes produce large behavioural differences – in the body, in the analytical laboratory, and in the catalogues of the suppliers who sell them. Hordenine, synephrine, octopamine, tyramine and N-methyltyramine all share the same two-carbon chain and the same aromatic ring. What separates them is the

Hordenine hydrochloride (CAS 6027-23-2) is a small molecule with an outsized reputation: a phenethylamine alkaloid that occurs naturally in germinating barley, in several cactus species and in a handful of grasses, sold commercially as a 98% crystalline salt for nutraceutical formulation, brewing research and pharmacology. Its structure is almost aggressively simple – a para-hydroxylated phenethylamine

Buying Halogenated Anilines: Reading the CoA and the Impurity Profile A certificate of analysis for a halogenated aniline is a short document, and almost all of the commercial risk sits in the four or five numbers that are not on it. Assay is the number everyone looks at first and it is the least informative:

Chlorofluoroaniline Isomers: Why the Position of the Halogens Decides Everything There is a procurement failure that repeats across the fine-chemical industry every few months: a buyer orders “chlorofluoroaniline”, receives a white crystalline solid with a correct-looking certificate of analysis and a 99% assay, and discovers three steps into the campaign that the halogens are in

1. 3-Chloro-4-fluoroaniline (CAS 367-21-5): An Overview 3-Chloro-4-fluoroaniline – also written as 3-chloro-4-fluorobenzenamine (CAS 367-21-5, molecular formula C6H5ClFN, molecular weight 145.56 g/mol) – is a doubly halogenated aniline carrying an amino group at C1, chlorine at C3 and fluorine at C4. It is supplied as a white to off-white crystalline solid, typically at 99% GC purity,

Some intermediates are bought on a catalogue line and shipped the same week. Others – isatin-3-oxime (CAS 607-28-3) is a good example – only exist inside a project: one customer, one route, one specification, a quantity in the tens of kilograms, and a repeat order next year if the programme survives. Those two situations need