// The CAS-number directory for AI search
The chemicals directory AI cites.
Every compound on Chemfused is a structured record — CAS number, properties, GHS safety, suppliers — built so ChatGPT, Perplexity and Google AI can read it, quote it, and send buyers to you.
Plans from $249/year · three months free
- Compound records
- 207,000+
- Synonyms indexed
- 3.3M
- Structured data
- JSON-LD, every page
- AI crawlers
- Explicitly allowed
// Why now
Buyers stopped Googling. They started asking.
Procurement teams, researchers, and lab managers increasingly ask AI assistants to find chemicals for them. "Who supplies 98% pure acetonitrile in 2.5L bottles?" gets answered by ChatGPT, Perplexity, and Google's AI Overviews — pulling from structured, machine-readable sources across the web.
If your product data isn't structured for AI, you're invisible in those answers. Chemfused fixes that.
// Process
Three steps to get listed.
Sign up free
Create your supplier account in under two minutes. Add your card to start your three-month free trial — we won't charge until it ends.
Add your products
Enter a CAS number and we auto-fill the chemical data from authoritative sources. You add your commercial details: purity, pack sizes, pricing, lead time, and a link to your product page. Or import your whole catalog at once from a CSV using our ready-made template.
Receive enquiries
Buyers land on your CAS pages and submit quote requests. Enquiries land in your inbox and your dashboard, with an optional webhook if you want them pushed straight into your own systems.
// Features
Everything you need. Nothing you don't.
Unlimited products
List every CAS number you supply. No per-SKU fees, no tier limits.
Auto-filled chemical data
Automatic chemistry data pulled from PubChem by CAS number. Enter the CAS, we handle the formula, IUPAC name, and safety data.
Structured for AI search
Every page ships with schema.org markup, clean semantic HTML, and llms.txt — the signals AI crawlers look for.
Enquiry dashboard with email notifications
All quote requests in one place, and an email the moment one arrives. Mark as replied, export, follow up.
CSV import with a ready-made template
Download the template, fill in your product names, IDs, and CAS numbers, upload. We map the columns and queue chemical lookups automatically.
Public supplier profile page
A dedicated page listing your full catalog and company details — one link to share or point buyers to.
// Pricing
Choose the plan that fits your reach.
All plans start with a 3-month free trial. Cancel anytime before it ends — we won't charge until then.
Standard
For single-country suppliers
- Unlimited products
- Unlimited enquiries
- One country of operation
- Full enquiry dashboard
- Webhooks for new enquiries
- Structured data on every listing
Multi-Country
For suppliers shipping across borders
- Everything in Standard
- List across multiple countries*
- Country-specific pricing and pack sizes
- Appear in buyer searches filtered by region
- Priority email support
Max
For suppliers who want to be found first
- Everything in Multi-Country
- Preferred Supplier placement
- Auto-included on all enquiries
- Featured supplier badge on all listings
- Priority in AI-structured data output
- Direct line to the Chemfused team
All plans auto-renew annually. Cancel anytime from your dashboard. Founding suppliers on any tier lock in their launch price for life.
*You must have a valid site address for each country you select.
// Who it's for
Built for chemical suppliers of every size.
Fine chemical manufacturers
Put your specialty compounds in front of the researchers already searching for them — by CAS, by name, by synonym.
Distributors
Surface your full catalog without rebuilding your website. Point buyers from Chemfused straight to your existing product pages.
Niche and regional suppliers
Compete on visibility, not ad spend. AI answers don't care how big you are — they care how well your data is structured.
// For chemical suppliers
Sell on Chemfused.
List your products once and get discovered by procurement managers, lab buyers, and AI search engines searching by CAS number — before your competitors do. Founding supplier spots are limited.
Plans from $249/year. Three months free. No card required until trial ends.
// FAQ
Frequently asked questions
- Will my products really show up in ChatGPT and Perplexity?
- We can't promise placement in any specific AI answer — no platform can honestly make that claim. What we can promise is that your data is published in the structured, crawlable format that AI systems are trained to read. Well-structured data in a high-authority directory is the single biggest lever you have.
- How is this different from listing on other chemical directories?
- Most chemical directories were built for the pre-AI web. They rely on keyword SEO and paid placements. Chemfused is built CAS-first, with schema markup and AI-crawlable structure on every page. It's a different foundation for a different kind of search.
- What's the difference between the three plans?
- Standard is for suppliers operating in one country. Multi-Country lets you list across multiple regions with localized pricing and pack sizes. Max Plan adds two things on top: your listings appear in a Preferred Suppliers section at the top of every CAS page, and you're automatically included as a recipient whenever a buyer submits an enquiry for a product you list.
- How does Preferred Supplier placement work?
- On every CAS hub page, suppliers are displayed in two sections: Preferred Suppliers at the top (Max Plan only) and All Suppliers below. Within each section, listings are ordered by founding supplier status, response rate, and completeness of listing data. Max Plan suppliers also receive every matching enquiry automatically, without the buyer needing to tick their name.
- What happens to my listings if I cancel?
- Your listings stay live through the end of your paid period, then come down. Your account data is retained for 90 days in case you return.
- Can I import my existing product catalog?
- Yes — download our CSV template, fill in your product names, IDs, and CAS numbers, and upload it. We map the columns automatically and queue chemical data lookups for every CAS you supply.
- Is there a long-term contract?
- No. It's annual billing after your free trial. Cancel anytime from your dashboard.
// Get listed
Be one of the suppliers AI learns first.
Founding supplier spots are limited. Lock in today's pricing for life, priority placement, and the founding supplier badge before we open to everyone.