Hpmc Ophthalmic Solution Usp
Meta Title:
HPMC Ophthalmic Solution USP | Pharma Grade Excipient Supplier China - Tang Zhi Technology
Meta Description:
Reliable HPMC ophthalmic solution USP for eye drop formulations. GMP-certified pharma excipient from Tang Zhi Technology Hebei factory. Custom viscosities, USP/NF compliant. Export to USA. Inquire for samples, specs, pricing.
Li Wei
Export Director, Tang Zhi Technology (Hebei) Co., Ltd.
Over 12 years in cellulose excipients for pharma and ophthalmics. Handled exports to 40+ countries, including major US formulators.
HPMC Ophthalmic Solution USP: Pharma-Grade Viscosity for Eye Care Formulations
Sourcing reliable HPMC for ophthalmic solutions? We've supplied this to US and EU eye drop manufacturers for years. Direct from our Hebei factory.
Navigating the Demand for HPMC in Ophthalmic Formulations
When procurement teams start searching for HPMC ophthalmic solution USP, it's usually because their current supplier hit a snag—maybe delayed shipments from India or inconsistent viscosity grades from domestic sources. We've seen this pattern repeat over the years. At Tang Zhi Technology in Hebei, we've been producing pharma-grade HPMC specifically tuned for eye care since 2012.
Picture this: your formulator needs a clear, non-irritating viscosifier for artificial tears or lubricant drops. It has to meet USP monograph standards, dissolve cleanly in saline buffers, and hold that pseudoplastic flow without clumping. That's where our HPMC steps in. Not the construction-grade stuff you see everywhere, but purified, low-ash, high-purity grades optimized for ocular use.
Our factory runs dedicated lines for medical excipients. Annual output tops 40,000 tons across cellulose derivatives, with HPMC ophthalmic lots segregated to avoid cross-contam from building additives. We've shipped to US contract manufacturers formulating for brands like Bausch + Lomb equivalents. Lead times? Typically 10-15 days to US ports once PO is confirmed.
Why does this matter in procurement? Eye drop excipients can't afford batch failures. One off-spec viscosity, and your stability tests fail, delaying FDA filings by months. We've helped buyers avoid that by providing COAs upfront and third-party testing options from SGS or Eurofins.
Let's break it down operationally. HPMC—hydroxypropyl methylcellulose—forms a thermo-reversible gel in the eye, mimicking natural tears. USP grade means it complies with United States Pharmacopeia limits on heavy metals (under 5ppm), microbial counts (under 100 CFU/g), and residue on ignition (max 1.5%). We hit those every batch, thanks to our multi-stage purification: solvent precipitation, ultrafiltration, and spray drying under GMP conditions.
Buyers often ask about substitution risks. Can you swap with HEC or CMC? Sometimes, but HPMC's clarity and residence time beat them in most ocular formulas. We've run side-by-side trials with clients—HPMC holds better in preservative-free multidose bottles.
Market pressures add up. Post-COVID, ophthalmic demand surged 20-30% for dry eye products. Supply chains tightened on raw cotton linters, pushing prices up. Smart purchasers lock in Chinese factories like ours early. We offer 12-month contracts with price stability clauses.
One importer from California told us last quarter: "Your HPMC saved our Q3 launch. Competitor quoted 25% higher with 4-week delays." Real talk from the field.
In short, if you're vetting suppliers for HPMC ophthalmic solution USP, look beyond price. Check factory audits, viscosity consistency across grades (from 5 cPs to 50,000 cPs), and export compliance. That's our wheelhouse.
Ready to compare? Request our full spec sheet and sample—no obligation.
Technical Deep Dive: What Makes Our HPMC USP-Compliant
HPMC isn't one-size-fits-all. For ophthalmic solutions, we tailor substitution degrees: methoxyl 19-24%, hydroxypropyl 7-12%. This balance gives the right gel strength without haziness.
Production starts with refined cotton cellulose. Alkalization, etherification with propylene oxide and methyl chloride, then neutralization. Our twist? Dual reactors for precise DS control, yielding batches with polydispersity index under 2.0—key for reproducible rheology.
Viscosity grades matter most. Low-vis (3-100 cPs) for thin drops; medium (400-4000 cPs) for gels. We measure at 2% aqueous solution, 20°C, Brookfield LVF spindle. Tolerance? ±10%, tighter than many competitors.
Purity hurdles: Bacterial endotoxin <0.5 EU/mg. We sterilize via gamma irradiation post-dry, optional for sensitive lots. Solubility? Cold-water dispersible, no lumps if hydrated properly.
Common pitfall: Hydration sequence. Add HPMC to buffer first, stir 30-60 min at RT. Heat speeds it up but risks fish-eyes. We've seen formulators waste batches rushing this.
Stability? In pH 6-8, autoclavable up to 121°C for 15 min. No depolymerization above 80% retention. Ideal for terminally sterilized multidose vials.
Operational note: Shelf life 3 years in PE-lined drums. Store cool, dry—humidity spikes gel it prematurely.
Real-World Applications in Ophthalmic Products
Artificial tears top the list. Our HPMC at 0.2-0.5% mimics mucin layer, extending comfort 4-6x over saline.
Lubricant gels for post-LASIK. Higher viscosity holds on cornea longer, reduces friction.
Drug delivery: Sustained release matrices for glaucoma meds like timolol. HPMC erodes predictably, cutting dosing frequency.
Preservative-free systems: Enables spray-dried combos with buffers, stable in unit-dose tips.
In pediatric formulas, low-irritation profile shines—no stinging reports from our clients.
- Dry eye syndrome: Primary vehicle in OTC drops.
- Contact lens solutions: Rewetting agents.
- Post-surgical: Protective films.
- Veterinary ophthalmics: Same specs, lower volumes.
Buyer's Guide: Sourcing HPMC Ophthalmic Solution USP
Procurement directors know the drill. Start with vendor audit. Ask for DMFs filed with US FDA? We have ours ready.
Risk check: Supply continuity. Our 140,000 sqm facility has backup power, raw stock for 6 months.
Pricing tiers: Bulk 25kg drums $8-15/kg FOB Tianjin, volume discounts over 5 tons. Samples free for qualified buyers.
MOQ flexible: 100kg trials ok.
Watch for: Gray-market HPMC relabeled as USP. Test microbial yourself first batch.
Contract tips: Include viscosity retest clause, 30-day payment post-inspection.
Detailed Specifications Table
| Parameter | USP Specification | Tang Zhi Grade |
|---|---|---|
| Viscosity (2% sol.) | Per grade | ±10% @20°C |
| pH (1% sol.) | 5.0-8.0 | 5.5-7.5 |
| Loss on Drying | ≤5.0% | ≤3.0% |
| Residue on Ignition | ≤1.5% | ≤0.5% |
| Heavy Metals | ≤5ppm | ≤2ppm |
| Total Bacteria | ≤100 CFU/g | ≤20 CFU/g |
| Methoxyl (%) | 19.0-24.0 | 22.0-24.0 |
| Hydroxypropyl (%) | 7.0-12.0 | 8.0-11.0 |
hpmc ophthalmic solution hpmc ophthalmic solution usp lacrigel hpmc eye ointment
Grades available: K4M, K15M, K100M equivalents. Custom blends on request.
Why Tang Zhi Technology? Factory Capabilities
140,000 sqm site in Jinzhou, Hebei. 90,000 sqm built, fully automated lines from Germany/Italy tech.
Dedicated pharma wing: Cleanrooms Class 100,000, HEPA filtered. Separate HPMC/MHEC/PVA runs.
Capacity: 50,000 tons cellulose/year. HPMC ophthalmic ~5,000 tons allocated.
OEM/ODM? Yes. Private label your HPMC with custom packaging. We've done for EU pharma houses.
Logistics from China to Your Door
FOB Tianjin/Xingang. 20' container holds 16 tons (640 drums). LCL 1 ton min.
Sea to US West Coast: 15-20 days. East: 25-30. Air express for samples: 3-5 days DHL.
Incoterms flexible: CIF, DAP. Duty? HS391239, ~3.1% US MFN.
Warning: Avoid summer peaks—port congestion adds 7 days. We pre-book slots.
Certifications That Matter
GMP certified for excipients. ISO 9001, ISO 14001, Halal/Kosher. USP/EP/JP compliant testing.
Full dossiers available NDA.
Feedback from Procurement Pros
Maria Gonzalez, Purchasing Manager, Pharma Labs Inc., California
"Switched to Tang Zhi HPMC after viscosity drift from previous supplier. Batches consistent, passed our in-house endotoxin test first time. Pricing beat Dow by 18%. Will reorder."
Dr. Raj Patel, Formulations Lead, EyeCare Distributors, New Jersey
"Excellent clarity in our artificial tear formula. No haze post-autoclave. Fast samples helped speed validation. Logistics smooth to Newark."
Sarah Kim, Supply Chain Director, OTC Pharma, Texas
"MOQ flexibility got us through a tight launch. USP COA matched exactly. Recommend for anyone scaling ophthalmic lines."
James O'Connor, Ops Manager, Contract Filler, Florida
"Heavy metals way below spec. Held up in stability 6 months. Good partner for OEM."
Buyer FAQs
Is your HPMC suitable for preservative-free eye drops?
Yes. Low bioburden and clean solubility profile. Tested in PBS buffers.
What packaging options?
25kg fiber drums, PE inner liner. Custom 10kg for trials.
Lead time for USA?
Production 7-10 days, ship 15-25 total. Expedite available.
OEM labeling?
Full service. Min 1 ton, your branding.
Vegan/Kosher?
Plant-based, Kosher/Halal certified.
Ready to Source Your HPMC Ophthalmic Solution USP?
Cut risks, lock in quality. Direct factory pricing.
Tang Zhi Technology (Hebei) Co., Ltd.
Room 2308, Dongsheng Plaza 2, No. 508 Zhongshan East Road, Chang’an District, Shijiazhuang, Hebei, China
Phone/Whatsapp: +86-15032625168
Email: admin@tangzhicellulose.com
© 2026 Tang Zhi Technology. All rights reserved. GMP | ISO Certified.
