Guaifenesin suppliers?

Sure—guaifenesin API is sold by many reputable chemical/pharma suppliers. To tailor a short list, I’d need a bit more detail (region, API vs finished product, required grade, and quantity). In the meantime, here are reliable sources that commonly stock guaifenesin API or pharma-grade material:

Global API/chemical suppliers
- Merck/MilliporeSigma (Sigma-Aldrich) — guaifenesin API
- Thermo Fisher Scientific (Alfa Aesar, Acros Organics lines) — guaifenesin API
- Avantor/VWR — guaifenesin API
- Spectrum Chemical Mfg Co — guaifenesin API
- TCI America / TCI Europe — guaifenesin API

Notes
- These are reputable, typically able to provide CoA/Certificate of Analysis, GMP/ISO confirmations, and USP/NF or EP grade material.
- Availability and packaging (e.g., 25 kg drums for API) vary by region.

If you’re looking for finished dosage forms (e.g., ready-made guaifenesin syrups/tablets) or contract manufacturers for formulation, I can point you to CMOs and distributors that supply finished products.

Helpful questions to pinpoint good matches:
- Are you after API (bulk) or finished products?
- What region/country are you in?
- What grade is required (pharmaceutical API, USP/EP grade, technical grade)?
- Typical quantity or annual volume?
- Any regulatory requirements (GMP, CoA, specific pharmacopeia)?

Tell me your region and needs, and I’ll tailor a short, concrete supplier list with contact points.