Which CAS numbers are listed?

Triacetyl-5-deoxy-D-ribose (62211-93-2), n-pentyl chloroformate (638-41-5) and cytosine (71-30-7). Together they cover the protected sugar, nucleobase and carbamate-forming element on established routes.

Do you also supply trifluoromethanesulfonic acid?

Yes, CAS 1493-13-6 may be supplied as a general process reagent where the selected route requires it. It is not listed as a capecitabine intermediate.

Can we take only intermediates, or only API?

Yes. The layers are modular. Many partners start with the listed building blocks, then add API once the route and impurity file are firm.

Who is this program for?

Marketing-authorisation holders, regional manufacturers and distributors who need qualified capecitabine intermediates or API. Not for patients or retail dispensing.

Capecitabine key intermediates and API

Oral fluoropyrimidine — take building blocks, API, or both. The listed CAS numbers cover the sugar, nucleobase and carbamate-forming element on established routes.

Fluoropyrimidine
Oral
Key intermediates
API

01Route

Key intermediates

Protected sugar, nucleobase and carbamate-forming element for established capecitabine routes.

CAS 62211-93-2, 638-41-5 and 71-30-7 listed
Stereochemistry, assay, related substances and moisture named in the spec

02Commercial

Active pharmaceutical ingredient

Capecitabine API for colorectal, breast, gastric, gastroesophageal and pancreatic-cancer programs.

Downstream purification burden reduced when building blocks are controlled
Assay, related substances and moisture named in the spec

Building blocks listed

Protected sugar, nucleobase and carbamate-forming element used on established capecitabine routes. Tell us which numbers you need and the volume range.

62211-93-2

638-41-5

71-30-7

Originator program — not a Unibest branded product

Fluoropyrimidine

Oral class across GI and breast cancer (originator brand: Xeloda)

Industry context

Capecitabine is a widely established oral fluoropyrimidine used across colorectal, breast, gastric, gastroesophageal and pancreatic cancer treatment. That is why route building blocks and API need a commercial-ready supply — not a research-only catalogue.

For manufacturers and marketers

Marketing-authorisation holders

Regional manufacturers

Distributors

Not a consumer offer, and not originator-branded product.

Why this supply

Three listed building blocks cover the established route; stereochemistry and moisture have to be named so conversion stays efficient.

Route building blocks, named

Triacetyl-5-deoxy-D-ribose (CAS 62211-93-2), n-pentyl chloroformate (CAS 638-41-5) and cytosine (CAS 71-30-7) cover the protected sugar, nucleobase and carbamate-forming element required by established capecitabine routes.

Stereochemistry and impurity control

Consistent control of stereochemistry, assay, related substances and moisture supports reaction performance and reliable API quality.

Less purification, tighter economics

Reliable building-block supply can help API manufacturers improve reaction performance, reduce downstream purification and maintain cost-efficient production. We quote against specification and volume — not a list price on this page.

Process reagent on request

Trifluoromethanesulfonic acid (CAS 1493-13-6) may also be supplied as a general process reagent where required by the selected route. It is not a capecitabine intermediate.

How a program starts

Same sequence whether you take building blocks, API, or both.

01
Scope
Which CAS numbers, grade, volume and whether you need intermediates, API, TfOH, or a mix. We confirm what we can stand behind before work starts.
02
Align the file
Specification, CoA format, stereochemistry, related substances and moisture — written down while gaps are still cheap to close.
03
Qualify supply
Listed lots and/or commercial API against that spec. Audit findings stay in the same program plan.
04
Deliver and hold
First shipment, then change control from one owner.

Frequently asked

No. This is a B2B supply of key intermediates and API for the molecule. It is not a consumer product and not offered under originator brand names, including Xeloda.

Ready to scope a supply?

Send the grade and a volume range. We reply with what we can stand behind.