
Development and production of customized nonionic and anionic surfactants as well as pharmaceutical active ingredients and excipients.

Schaerer Schlaepfer AG
4852 Rothrist (Headquarters / Production) · SwitzerlandNew on Amplifa
About us
Schaerer Schlaepfer AG is a chemical plant based in Rothrist, Switzerland, specializing in the development and production of surface-active substances. Its core competence lies in nonionic and anionic surfactants as well as alkoxylation of complex starters with various oxiranes. The product range also includes carboxylic acid esters, surfactant blends, formulated preparations, and anionic surfactants such as Turkish red oil, alkyl phosphates, alkyl sulfates, and sulfosuccinates. Customized surfactants are developed in collaboration with customers; an online product configurator enables the definition of individual products. Production takes place on flexibly deployable systems that can respond to different customer requirements. Since 2003, the company has held a Swissmedic license for the manufacture of pharmaceutical active ingredients. The products are used in Switzerland, the European Union, and worldwide, including in coatings, paints, inks, detergents, lubricants, agrochemicals, the cosmetics and pharmaceutical industries, as well as the construction and polymer industries.
- Site
- Rothrist
- Processes
- Alkoxylation of complex starters with various oxiranes, Manufacture of nonionic surfactants, Manufacture of anionic surfactants (e.g. Turkish red oil, alkyl phosphates/sulfates,, Manufacture of carboxylic acid esters, Manufacture of surfactant blends, Manufacture of formulated preparations, Manufacture of pharmaceutical active ingredients and excipients (Swissmedic license since 2003), Customized surfactants via product configurator
- Materials
- Nonionic surfactants, Anionic surfactants, Turkish red oil, Alkyl phosphates, Alkyl sulfates, Sulfosuccinates, Carboxylic acid esters, Oxirane-based oligomers
- Certificates
- Swissmedic license for the manufacture of pharmaceutical active ingredients, Swissmedic license (pharmaceutical active ingredients), ISO 9001, ISO 14001, GMP/GDP compliant, REACH compliant
- Industries
- Coatings, paints, inks, Detergents and cleaners, Lubricants, Agrochemicals, Textile and leather auxiliaries, Personal care, cosmetics and pharmaceutical industry
- 01
Customer inquiry and product configuration
- 02
Customized development of surfactants
- 03
Alkoxylation of complex starters with various oxiranes / Production
- 04
Production of surfactant blends and formulated preparations
- 05
Quality assurance and delivery
Products and Processes
Nonionic surfactants
Core product group, used as oxirane-based oligomers in many market segments.
Anionic surfactants
Include, among others, Turkish red oil, alkyl phosphates/sulfates, and sulfosuccinates.
Alkoxylation of complex starters
Focus process using various oxiranes for individual customer products.
Carboxylic acid esters
Part of the product range for various technical applications.
Pharmaceutical active ingredients and excipients
Manufactured under Swissmedic license since 2003.
Locations

Rothrist
CHHeadquarters and Production (Chemical Plant)
- Materials
- Nonionic and anionic surfactants, carboxylic acid esters, active ingredients and excipients
- Flexibly deployed production systems
Product Areas

Inside the production



Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Alkoxylation of complex starters with various oxiranesChemical synthesis | – | – | – | – | Oxiranes, complex starters |
| Manufacture of nonionic surfactantsChemical synthesis | – | – | – | – | – |
| Manufacture of anionic surfactants (e.g. Turkish red oil, alkyl phosphates/sulfates,Chemical synthesis | – | – | – | – | – |
| Manufacture of carboxylic acid estersChemical synthesis | – | – | – | – | – |
| Manufacture of surfactant blendsMixing/Formulation | – | – | – | – | – |
| Manufacture of formulated preparationsMixing/Formulation | – | – | – | – | – |
| Manufacture of pharmaceutical active ingredients and excipients (Swissmedic license since 2003)Chemical synthesis | – | – | – | – | – |
| Customized surfactants via product configuratorChemical synthesis | – | – | – | – | – |
Additional services
Quality and Certificates
The Swiss quality requirement shapes production; a Swissmedic license for the manufacture of pharmaceutical active ingredients has been in place since 2003. In addition to GMP and GDP compliance, the company demonstrates REACH compliance as well as ISO-9001 and ISO-14001 certification.
| Evidence | Rothrist |
|---|---|
| Swissmedic license (pharmaceutical active ingredients) | |
| ISO 9001 | |
| ISO 14001 | |
| GMP/GDP compliant | |
| REACH compliant |
History
- ca. 1946
Almost 80 years of company history; exact founding year not specified.
- 2003
Received the Swissmedic license for the manufacture of pharmaceutical active ingredients.
- 2026
Acquisition of Hydrior AG; the integrated product portfolio expanded the offering in the field of surfactant specialties and strengthened the market position in the cosmetics industry.