Albendazole is bought on the certificate and the grade statement rather than on price per kilogram, because the material itself is the same molecule in both grade families and the difference sits almost entirely in what has been tested and documented. This page is the sourcing checklist: what to ask for, what the answers should look like, and the failure patterns that turn up most often.
The document set to hold before the first delivery
| Document |
What it must contain |
What it is used for |
| Batch certificate of analysis |
All parameters of the named monograph, with measured values not “conforms” |
Release of the incoming lot and the core of any customer audit |
| Grade statement |
USP 2026, EP 12.3 or veterinary, named explicitly |
Ties the material to a specification; without it the certificate is unattached |
| Particle size report |
Full distribution and the method |
Dissolution behaviour, not just compliance with a D90 figure |
| SDS |
GHS format, in the language your market requires |
Mandatory for supply |
| Residual solvent data |
Methanol and toluene figures (human grade) |
ICH Q3C compliance evidence |
| Impurity data |
The named compounds individually, plus unspecified and total |
Demonstrates the profile, not only the total |
| Regulatory statements |
TSCA and REACH status for CAS 54965-21-8, confirmed on enquiry |
Import and registration |
Six questions that separate a qualified source
| Question |
A good answer |
A weak answer |
| Which monograph edition is the certificate written against? |
A named edition, with the parameter set that goes with it |
“Pharma grade” or “USP standard” with no edition |
| Can you report the six named related compounds individually? |
Six values or “not detected” entries with detection limits |
A single total-impurity figure |
| What is the albendazole ethyl carbamate result? |
A measured value, or “not detected” with a stated limit of detection, or a route-based justification |
Silence – the monograph names this impurity for a reason |
| Is the particle size reported as a distribution and method? |
D10 / D50 / D90 plus the technique |
A single “D90 < 20” with no method |
| Is the site and route fixed order to order? |
A stated site, and batches that trace to it |
“Best available source” |
| Is the oxidative pair re-tested after micronisation? |
Post-milling figures on the certificate |
Pre-milling data only |
Failure patterns worth designing out
| Pattern |
How it shows up |
How to prevent it in the order |
| Grade substitution |
A veterinary lot offered against a human specification “because the assay is 99%” |
Name the monograph and the impurity set in the purchase order, and check the certificate against it on arrival |
| Ageing in the warehouse |
Assay at the low end with the sulfoxide and sulfone rising |
Agree remaining shelf life on delivery; ask for three recent batch certificates |
| Particle size drift |
D90 inside the limit but dissolution shifting between lots |
Specify the full distribution, and qualify against dissolution rather than a single figure |
| Documentation gaps at audit |
No grade statement, SDS in the wrong language, impurity data missing the carbamate |
Hold the full document set before the first delivery, not after |
| Shared-chemistry cross-contamination |
Fenbendazole related compounds at the higher end of their limits |
Ask about the plant’s other products; trend the fenbendazole figures across batches |
| Coarse tail in an otherwise compliant lot |
D90 met, dissolution still slow |
Ask for D50 and the coarsest decile, and for dissolution data if available |
Commercial terms to fix
| Item |
What to agree |
| Packaging |
25 kg fibre drum with double PE liner; confirm the liner specification, because the material is oxidation and moisture sensitive |
| MOQ and lead time |
Per grade and destination – human grade and veterinary grade may not ship on the same schedule |
| Sample |
From the exact grade and the exact particle size, enough for assay, impurities and a dissolution check |
| Remaining shelf life |
A stated minimum on delivery |
| Change notification |
Advance notice of any change of site, route or micronisation partner |
| Retest obligation |
Who carries the cost if the delivered lot fails the agreed specification |
What we supply, and what we do not claim
Albendazole as a human-grade API to the USP specification, with an EP 12.3 option whose detailed parameter set is issued on request, and as a separate veterinary grade with the iron and related-substance limits shown on the product page. Every batch ships with a certificate against the specification ordered, and the particle size distribution is reported.
We describe the material and its documentation. We do not make therapeutic claims, and the indications, dose and marketing authorisation for any finished product are the responsibility of the licence holder in each market.
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