• OU Infrared NPS
•  +37253736637
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• ORCHID CHEMICAL SUPPLIES LTD (OCS)
•  +86-571-85395792
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• onicon gruup
•  86-717-6307579
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• Onlychem (Jinan)Biotech Co.,Ltd
•  86-531-83175885
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• OASIS FINE CHEM
•  0091-2667-251651
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• Oriental Chemical Group Co,.Ltd
•  86-335-5311838
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• Orgo Chem (Guj) Pvt. Ltd.
•  +91-261-2397474
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• orichem international ltd
•  0571-85270505-112
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• Orichem
•  +86-571-85270505
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• Okeanos Tech Jiangsu Co. Ltd.
•  +86-510-86636249
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• OPO INTERNATIONAL TRAD (CHINA) CO.,LIMITED
•  86-01080740481
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• Omicron Biochemicals, Inc.
•  574-287-6910
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• Ok Chem Co
•  +86-139-58021162
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• Oracle Biotech India Pvt Ltd
•  +91-22-67106978
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• ouyuansheng chemical
•  86-022-60677065
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• OZERSOYLAR TARIM URUNLERI GIDA MAD.SAN VE TIC LTD STI.
•  5325964981
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• Orex Pharma Pvt Ltd
•  91-22-25333379
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• OrgSynChem (Beijing) Technology Co., Ltd.
•  +86-(10)-8189-7556, 6030-0056, +86-13522585276
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• Oswal Udhyog
•  +91-(22)-26744281
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• Organica Feinchemie GmbH
•  +7-(495)-5401096
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• Oriental Union Chemical Corporation
•  +886-(2)-27193333
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• Onichem Specialities Co., Ltd
•  +86-(411)-84794022
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• Oxford Laboratory
•  +91-(22)-2200 2645, 5637 5404
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• Odyssey Organics Pvt. Ltd.
•  +91-(251)-2691342
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• Om Impex
•  +91-(251)-2470889
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• Open Joint Stock Company
•  +380-6565-20371
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• O'Laughlin Chemical Co., Ltd
•  +852 2411 4633
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• Oxon Italia S.P.A
•  +39-2-35378.436
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• OmniChem
•  + 32 (10) 48 31 11
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• Outriger Corp.
•  +82-2-26757092
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• Ome Sea Interlink Pvt. Ltd.
•  +91-079-22873834
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• Oriental Corporation
•  +91-79-5504030 31035705
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• Otsuka Chemical Co., Ltd.
•  +1 212-826-4374
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• Occidental Chemical Corp
•  +1-972-404-3800
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• OSI Group Co., Ltd.
•  
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• Oil Chem
•  +1-(810) 235-3040
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• Orion Chem Pvt Ltd
•  +91 22 249380458/ 27782942 / 27782943
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• Oxxides, Inc
•  +1-845-2385142
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• Oxford Chemicals Limited
•  +44 (0) 1429 863555
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• Okeda Chemical Co.,Ltd
•  0086-20-85865682
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• OLYMPIC STAR PHARMACEUTICAL CO., LTD
•  +86-755-25310416
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• Oxiteno.
•  
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• OMKAR CHEMICALS & RESEARCH LABS..
•  +91-251-2690651/+91-251-2691602
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• Oasischem International
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• ORICHEM INTERNATIONAL LTD.
•  86-0571-85270505
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• Oxiteno S.A.
•  +55-11-3177-6583
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• Oceanchem Group-Globalsources Asia Limited
•  +86-536-8596048
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• Oak-Bark Corporation
•   910-762-5800
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• ORPEGEN Pharma GmbH
•   +49 6221 9105-0
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• Originchem Co., Ltd.
•   86-25-8697-8001/ 86-137-7051-9126 (mobile)
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