#1 Kdc/one Socal Laboratories, LLC
Based in Diamond Bar, CA
Contract Drug Manufacturers in Diamond Bar, CA
The top-ranked contract drug manufacturers serving Diamond Bar, CA are Kdc/one Socal Laboratories, LLC, Ethical Nutritional, LLC and KC Pharmaceuticals, Inc.. We list 242 contract drug manufacturers serving Diamond Bar, CA. 30 of the providers shown match an active record from U.S. Food and Drug Administration, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
Contract Drug Manufacturers serving Diamond Bar, CA (Los Angeles County). 242 providers, 10 of the top 10 verified against federal or state records. Registry records checked on 2026-11-04.
Top 10 ranked contract drug manufacturers for Diamond Bar
#2 Ethical Nutritional, LLC
Serves this area from Pomona, CA (3 mi)Call (909) 598-1010#3 KC Pharmaceuticals, Inc.
Serves this area from Pomona, CA (3 mi)Call (909) 598-9499 · Website#4 Ecolab Inc.
Serves this area from Industry, CA (5 mi)Call (800) 352-5326 · Website#5 Airgas USA, LLC
Serves this area from Pomona, CA (6 mi)Call (909) 629-5031 · Website#6 Diamond Wipes International, Inc.
Serves this area from Chino, CA (7 mi)#7 Prostat First Aid, LLC
Serves this area from La Verne, CA (7 mi)#8 Gilead Sciences, Inc.
Serves this area from La Verne, CA (7 mi)Call (909) 596-6138#9 Paklab
Serves this area from Chino, CA (7 mi)Call (909) 517-2442 · Website#10 American Regent, Inc.
Serves this area from Brea, CA (7 mi)
20 more providers serving this area
- Humex,Inc., Brea, CA (7 mi)
- Life Science Outsourcing, Inc., Brea, CA (7 mi)
- Bimeda Pomona Inc., Pomona, CA (8 mi)
- Super Care, LLC, Industry, CA (8 mi)
- Life Gene Pharma Group, LLC, Hacienda Heights, CA (8 mi)
- Clinical Resolution Laboratory, Inc., Brea, CA (8 mi)
- GVS TM, Inc, Covina, CA (9 mi)
- Innovatical Laboratories LLC, Montclair, CA (9 mi)
- OASIS Medical, Inc., Glendora, CA (9 mi)
- Norman, Fox & Co., Industry, CA (9 mi)
- Genuine Virgin Aloe Corporation, Anaheim, CA (10 mi)
- Westwood Laboratories, LLC., Irwindale, CA (10 mi)
- Nippon Sanso Matheson, Inc., Irwindale, CA (10 mi)
- Technichem Corp, Anaheim, CA (10 mi)
- arch dental & Medical supply, Anaheim, CA (10 mi)
- Biochem Scientific Laboratory LLC, Upland, CA (10 mi)
- GMP Laboratories of America, Inc., Anaheim, CA (10 mi)
- WestAir Gases & Equipment, Inc., Anaheim, CA (10 mi)
- AMF Pharma LLC, Ontario, CA (10 mi)
- S&B Pharma LLC dba Norac Pharma, Azusa, CA (10 mi)
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Frequently asked questions
How many contract drug manufacturers serve Diamond Bar?
We list 242 contract drug manufacturers serving Diamond Bar, CA: 1 based there and 241 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.
Which contract drug manufacturers serve Diamond Bar?
The top-ranked contract drug manufacturers serving Diamond Bar, CA are Kdc/one Socal Laboratories, LLC, Ethical Nutritional, LLC, KC Pharmaceuticals, Inc., Ecolab Inc. and Airgas USA, LLC. The full ranked list, with the official records each provider matched, is on this page.
Which contract drug manufacturers serving Diamond Bar are verified against official records?
10 of the top 10 match an active official record: Kdc/one Socal Laboratories, LLC (U.S. Food and Drug Administration), Ethical Nutritional, LLC (U.S. Food and Drug Administration), KC Pharmaceuticals, Inc. (U.S. Food and Drug Administration), Ecolab Inc. (U.S. Food and Drug Administration) and Airgas USA, LLC (U.S. Food and Drug Administration), and 5 more on this page. Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.
What does FDA establishment registration show?
Facilities that manufacture, prepare or process drugs for the U.S. market must register with FDA every year and list their operations. Registration is not an FDA approval of the facility or its products.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .