Pharma Intermediates, APIs & Specialty Excipients

About This Division

Building Blocks for Generic API Manufacturing

Alongside our environmental testing and water treatment businesses, Rispri Labs sources and trades pharmaceutical process intermediates, active pharmaceutical ingredients, and specialty excipients — connecting generic API manufacturers, CDMOs, and formulation houses with a vetted network of manufacturing partners.

Every listing below is identified by CAS number for unambiguous sourcing. Certificates of Analysis, technical data sheets, and MSDS documentation are available on request for all products.

40+

CAS-Listed Products

20+

Therapy & Application Areas

10KG

Standard MOQ

Process Intermediates

CAS-Listed Building Blocks, Grouped by Target Molecule

Sourced against confirmed synthetic routes for oncology, metabolic, respiratory, and CNS molecules. Standard minimum order quantity is 10 KG per intermediate; larger volumes and custom routes are quoted on enquiry.

Chemical Name	CAS No.
Osimertinib
N1-(2-(Dimethylamino)ethyl)-5-methoxy-N1-methyl-N4-(4-(1-methyl-1H-indol-3-yl)pyrimidin-2-yl)benzene-1,2,4-triamine	1421372-66-8
Nilotinib
Methyl 4-methyl-3-((4-(pyridin-3-yl)pyrimidin-2-yl)amino)benzoate	917392-54-2
4-Methyl-3-[[4-(3-pyridinyl)-2-pyrimidinyl]amino]benzoic acid ethyl ester	641569-97-3
4-Methyl-3-[[4-(3-pyridinyl)-2-pyrimidinyl]amino]benzoic acid	641569-94-0
3-(4-Methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)aniline	641571-11-1
Imatinib
N-(2-Methyl-5-nitrophenyl)-4-(pyridin-3-yl)pyrimidin-2-amine	152460-09-8
N-(5-Amino-2-methylphenyl)-4-(3-pyridyl)-2-pyrimidineamine	152460-10-1
4-[(4-Methylpiperazin-1-yl)methyl]benzoic acid dihydrochloride	106261-49-8
Sorafenib
4-(4-Aminophenoxy)-N-methylpicolinamide	284462-37-9
4-Chloro-3-(trifluoromethyl)phenyl isocyanate	327-78-6
Regorafenib
4-(4-Amino-3-fluorophenoxy)-N-methylpicolinamide	757251-39-1
4-Chloro-3-(trifluoromethyl)phenyl isocyanate	327-78-6
Lenvatinib
4-Chloro-7-methoxyquinoline-6-carboxamide	417721-36-9
1-(2-Chloro-4-hydroxyphenyl)-3-cyclopropylurea	796848-79-8
Lenalidomide
Methyl 2-(bromomethyl)-3-nitrobenzoate	98475-07-1
3-(4-Nitro-1-oxoisoindolin-2-yl)piperidine-2,6-dione	827026-45-9
2-Methyl-3-nitrobenzoic acid	1975-50-4
Methyl 2-methyl-3-nitrobenzoate	59382-59-1
Darolutamide
4-Bromo-2-chloro benzonitrile	154607-01-9
Tucatinib
1,1-Thiocarbonyldiimidazole	6160-65-2
Bicalutamide / Enzalutamide
4-Amino-2-(trifluoromethyl)benzonitrile	463-71-8
N-(4-Cyano-3-(trifluoromethyl)phenyl)methacrylamide	90357-53-2
4-Isothiocyanato-2-(trifluoromethyl)benzonitrile	143782-23-4

Chemical Name	CAS No.
Sitagliptin
1-(3-(Trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-4-(2,4,5-trifluorophenyl)butane-1,3-dione	764667-65-4
Glimepiride
2-Phenylethyl isocyanate	1943-82-4
Trans-4-methylcyclohexyl isocyanate	32175-00-1
Dabigatran
N-Hexyl chloroformate	6092-54-2
Fezolinetant
Chlorocarbonyl sulfenyl chloride	2757-23-5
5-Methyl-1,3,4-oxathiazole-5-one	17452-74-3
3-Methyl-1,2,4-thiadiazole-5-carbohydrazide	1375066-73-1

Chemical Name	CAS No.
Indacaterol Maleate
1-(8-(Benzyloxy)-2-hydroxyquinolin-5-yl)-2-bromoethanone	100331-89-3
5,6-Diethyl-2,3-dihydro-1H-inden-2-amine hydrochloride	312753-53-0
(R)-8-(Benzyloxy)-5-(2-((5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino)-1-hydroxyethyl)quinolin-2(1H)-one	435273-75-9
Vilanterol Trifenatate
(R)-5-(2,2-Dimethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one	452339-73-0
(R)-3-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one	503068-36-8
(1R)-2-[[6-[2-[(2,6-Dichlorobenzyl)oxy]ethoxy]hexyl]amino]-1-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)ethanol	503068-37-9

Chemical Name	CAS No.
Rivastigmine / Solifenacin
Bis(4-nitrophenyl) carbonate	5070-13-3
Tolnaftate
O-2-Naphthyl chlorothioformate (25% in toluene)	10506-37-3
General Organic Synthesis Building Blocks
4′-Chloroacetophenone	99-91-2
Phenyl chlorothiocarbonate	1005-56-7
Cyanogen bromide	506-68-3

Request CAS Sheet & Availability

Specialty Excipients

Carbomer Rheology Modifiers

High molecular weight, water-soluble polyacrylic acid polymers used as thickeners, suspending agents, and stabilizers across pharmaceutical gels, oral care, and personal care formulations.

Rheology Modifier

Carbomer 940

An extremely efficient rheology modifier capable of providing high viscosity and forming sparkling clear water or hydroalcoholic gels and creams — a proven thickener and stabilizer across personal care and pharmaceutical formulations.

Common NamePolyacrylic Acid

CAS No.9003-01-4

HSN Code39069090

AppearanceWhite, fluffy powder

Viscosity (0.5% w/v)40,000–60,000 cPs

Assay56.0%–68.0%

pH2.7–3.0

Loss on DryingNMT 2.0%

Download TDS Download MSDS

Rheology Modifier

Carbomer 980

A synthetic, cross-linked polyacrylate polymer offering higher clarity and finer viscosity control than 940 — well suited to hair styling gels, moisturizing formulations, sunscreens, and pharmaceutical gels & ointments.

Common NamePolyacrylic Acid

CAS No.9003-01-4

HSN Code39069090

AppearanceWhite, fluffy powder

Viscosity (0.5% w/v)40,000–60,000 cPs

Assay56.0%–68.0%

pH2.7–3.0

Clarity (0.5% w/v)≥90%

Typical Applications

Hair Styling GelHydro-Alcoholic Gel Moisturizing CreamSunscreen Lotion ToothpasteShampoo Pharma Gels & OintmentsSkin Fresheners

Download TDS Download MSDS

Bulk APIs

Active Pharmaceutical Ingredients Available on Enquiry

From time to time, bulk quantities of the APIs below become available through our sourcing network. Availability, batch documentation, and lot size are confirmed at the time of enquiry.

Methylprednisolone Hemisuccinate Darunavir Phenoxybenzamine Hydrochloride Temazepam USP Mycophenolate Mofetil USP Succinylcholine Chloride Calcium Levofolinate Eltrombopag Olamine Entecavir USP Tiopronin Desipramine Hydrochloride USP Clomipramine Hydrochloride USP Raloxifene Hydrochloride USP Felbamate USP Teriflunomide Ephedrine Sulfate USP Exenatide Phenylephrine Hydrochloride USP Norepinephrine Bitartrate USP Dexmedetomidine Hydrochloride USP

Check Current Availability

Quality & Sourcing

How We Source & Support Documentation

Verified Manufacturing Partners

Every intermediate and API is sourced from GMP-compliant manufacturers within our vetted partner network — not synthesized in-house.

Documentation on Request

COA, TDS, MSDS, and available regulatory filings (DMF/CEP status where applicable) are shared for every enquiry before order confirmation.

Flexible Order Sizes

Standard MOQ of 10 KG for listed process intermediates; higher-value or custom-route intermediates and bulk API lots quoted per enquiry.