A factory doesn’t buy your herbal slices because your brochure looks nice. They buy because they can release the lot with confidence.
And the release decision usually happens in one place: IQC (Incoming Quality Control).
If your shipment hits the dock and IQC can’t match your specification sheet + COA + label + lot code, your goods go straight into incoming quarantine. Then you get the classic email: “Please provide full specs, methods, and acceptance criteria.” Not fun. Also very normal.
So let’s build a spec sheet that a pharma plant or supplement factory can actually use. I’ll keep this practical, slightly blunt, and focused on real QA pain.
GMP teams think in five buckets:
Your spec sheet should map to these buckets. If it doesn’t, QA will rewrite it for you… and that rewrite will be stricter than you like.
Here’s a one-page skeleton that works in real factories. Use it as your base, then tailor the limits and methods per herb and per market.
| Section (QA keyword) | What to include (fields) | How IQC checks it | Common failure (why lots get “HOLD”) | Typical reference used |
|---|---|---|---|---|
| Identity | Latin name, plant part, Chinese name/aliases, origin, harvest season, processing type, slice form | Visual + documents + identity test | Wrong species/part, mixed lots, unclear processing | GMP spec rules + pharmacopeia logic |
| Physical | Appearance, color, odor, foreign matter, moisture, slice size, broken rate | Visual + quick tests | Too wet, mold smell, too much powder | WHO herbal processing practices |
| Chemical / Fingerprint | TLC/HPLC fingerprint, marker spec (if any), method ID | Lab test / confirm on COA | Fingerprint drift, method mismatch | ISO/WHO style QC methods |
| Contaminants | Heavy metals, pesticide residues, aflatoxins, sulfur dioxide (when relevant) | COA + spot checks | Panel missing, limits unclear, “tested if needed” wording | Market standard + ISO method sets |
| Microbial limits | TAMC, yeast & mold, coliforms/Enterobacteria, E. coli, Salmonella | COA + incoming test | Spec missing sample size (10 g/25 g), wrong category | AHPA-style microbial guidance |
| Traceability | Lot code format, COA-lot match rule, retain sample statement | Paper check | COA doesn’t match carton/bag | GMP documentation control |
| Storage | Ambient/cool/controlled atmosphere, humidity notes, shelf life | Warehouse SOP match | Moisture pickup, odor cross-contam | GMP storage rules |
| Documentation | COA format, test methods, acceptance criteria, deviation rule | QA review | No acceptance criteria, only “Pass” | Factory supplier quality manual |
This table already sounds like “factory language,” because it is. You’re not writing a blog. You’re writing a release tool.
Identity is your first gate. Don’t keep it vague.
Write what the buyer can verify. For each slice product, include:
Cut form isn’t “cosmetic.” It changes downstream behavior.
So instead of writing “sliced,” write something like:
Keep it simple. Just don’t leave it empty.
If you sell a broad catalog and need a clean way to organize identity by plant part, link buyers to your category structure so they can cross-check fast: All Herbs and Spices.
A COA that only says “PASS” is basically useless in a serious factory. QA wants:
Here’s the painful but real scenario (no fake names, just real life):
A buyer receives your shipment. The cartons say Lot 2407-A. Your COA says Lot 2407. Same month, not same lot. Their QA can’t assume. They quarantine it, open a deviation, and now the buyer’s production plan is messed up.
Add one line to your spec sheet:
“COA lot code must match carton and inner packaging. Any mismatch = HOLD pending deviation closure.”
It sounds strict. It also saves you from endless “can you confirm” emails.
Another common fight: your COA uses Method A, the customer lab uses Method B. Results differ slightly, and they call it OOS (out of spec). Now you’re in a re-test loop.
So write this in the spec sheet:
“Method alignment required during vendor qualification; lab-to-lab correlation recommended for key tests.”
Not fancy. Just honest.
Factories like two options:
For Chinese herbal slices, fingerprinting is often the safer play because herbs vary by origin and season. Marker specs are fine too, but don’t over-promise if the biology won’t behave.
Keep the section short:
Even this small clarity helps buyers plug it into their supplier qualification file.
This section decides if you pass audits.
List the panel (Pb, Cd, As, Hg is common). Then state:
“Limits follow the customer’s target market standard (USP/EP/CP or customer spec).”
Don’t argue about standards inside the spec sheet. Just be clear what you follow.
Write it as a defined panel, not “tested when requested.” That phrase kills trust.
If your herbs include nuts/seeds or high-risk materials, aflatoxins matter more. Call it out.
This one is huge for Chinese herbal slices. Some buyers assume it’s never present, then their lab finds it and panic starts. If SO₂ is a realistic risk category, include it upfront. No surprises.
Here’s a clean “panel view” table you can drop into your spec sheet:
| Contaminant group | Typical tests included | Why QA cares |
|---|---|---|
| Heavy metals | Pb, Cd, As, Hg | Audit red line, long-term safety |
| Pesticide residues | Multi-residue screen | Import checks, retailer compliance |
| Aflatoxins | B1, total aflatoxins | “Hard stop” if detected above limit |
| Sulfur dioxide | SO₂ | Common dispute item for herbal slices |
| Solvent residues (if any) | Only if extraction involved | Proof of clean process |
Keep it tight. No drama.
Micro specs must include sample size, or QA won’t accept it. That’s where many suppliers mess up.
A common set used in the botanical industry (example framework) looks like this:
| Micro test | Acceptance criteria (example framework) |
|---|---|
| Total aerobic microbial count (TAMC) | ≤ 10⁷ cfu/g |
| Yeast & mold | ≤ 10⁵ cfu/g |
| Coliforms / Enterobacteria | ≤ 10⁴ cfu/g |
| E. coli | Not detected in 10 g |
| Salmonella spp. | Not detected in 25 g |
Important: you should tune limits to the scenario. Tea bag herbs and capsule-grade slices don’t always share the same risk logic. But at least put a real table in front of QA. They can work with that.
Here’s factory “black words” that buyers live by:
You don’t need a full SOP in the spec sheet, but you do need short rules like:
It’s not sexy, but it’s what gets you into the approved supplier list.
Herbs can pass the lab and still fail the warehouse. Moisture and odor do that.
Your spec sheet should state:
When you sell into multiple regions, storage stability becomes part of the value story too.
Now the commercial part, but I’ll keep it natural.
If your buyer is a pharma company, a supplement factory, or a functional beverage brand, they don’t only ask “can you supply?” They ask “can you support the file?”
GuoCao is positioned as a one-stop wholesale supplier of Chinese medicinal herbs & spices, serving pharma, supplement processing plants, commercial buyers, hospitals, beverage brands, and distributors. If your customer needs stable supply and documentation, the selling points are straightforward:
You can point buyers to the right pages depending on what they ask:
Notice what this does: it answers QA + purchasing questions without a 30-email chain. It’s faster for everyone, and it feels more professional.
Do this once per key SKU, then reuse the format. You’ll cut qualification time a lot, and buyers will stop treating you like “just another trader.” That’s the real win.
