| Supplier | Phone | Fax | Country | Inquiry contact |
|---|---|---|---|---|
| Carbone Scientific Co., Ltd. | +44 (0)203 769 4441 ext 1 | +44 (0)203 769 4441 ext 2 | U.K. | REQUEST |
| CHEM 2004 B.V. | +31 15 25 75 900 | +31-15 25 72 505 | The Netherlands | REQUEST |
| Dayang Chem (Hangzhou) Co.,Ltd. | +86-571-88938639 | +86-571-8893-8652 | P.R.China | REQUEST |
| Dr. Paul Lohmann GmbH & Co. KGaA | +49 5155 63-0 | +49 5155 63 5834 | Germany | REQUEST |
| Helm U.S. Corporation | +1-(732)981-1160 | +1-(732)981 0965 | USA | REQUEST |