| | Order Code | Reference Substance | Quantity per vial | Information | Storage | Extra charges |
| | Z1900000 | Zidovudine | 60 mg | 99.5% Ci0Hi3N5O4 ; Batch 1 is valid until 31 December 2009 | +5°C | a |
| | Z1902000 | Zidovudine impurity A | 10 mg | 1-[(2R,5S)-5-hydroxymethyl-2,5-dihydro-2-furyl]-5-methyl pyrimidine-2,4(1H,3H)-dione | +5°C | a |
| | Z1904000 | Zidovudine impurity B | 10 mg | 1-(3-chloro-2,3-dideoxy-B-D-ribofuranosyl)-5-methylpyrimidine-2,4(1H,3H)-d ione ; Batch 1 is valid until 31 December 2008 | +5°C | a |
| | Z2000000 | Zinc acexamate | 50 mg | | +5°C | a |
| | Z2000010 | Zinc acexamate impurity A | 50 mg | 6-[[6-(acetylamino)hexanoyl]amino]hexanoic acid | +5°C | a |
| | Z2500010 | Zolpidem impurity A | 10 mg | N,N'-dimethyl-2-[7-methyl-2-(4-methylphenyl)imidazol[1,2-a] pyridin-3-yl]acetamide | +5°C | a |
| | Z3001000 | Zopiclone oxide | 20 mg | | +5°C | g |
| | Y0000062 | Zuclopenthixol decanoate - reference spectrum | n/a | | | l |
| | Y0000534 | Zuclopenthixol for system suitability | 0.1 mg | | +5°C | a |
| | Y0000083 | Zuclopenthixol impurity B | 10 mg | 2-chloro-9H-thioxanthen-9-one | +5°C | a |