Is extra pure material tested to a pharmacopoeia?

Not necessarily. Extra pure is a reagent grade defined by the producer. If you need a pharmacopoeial grade, ask for IP, BP, USP or Ph. Eur. material, and the COA will name the monograph.

How do I compare extra pure products from different producers?

Put the specifications side by side and check assay, the impurities listed and their limits. The product compare feature on Zemixal shows grade data together, which makes differences easy to spot.

Can extra pure be used for preparing buffers?

For most routine buffers, yes. For buffers used in validated assays or regulated testing, many laboratories prefer AR grade so the impurity profile is fully specified.

Chemical grade

Extra Pure Grade chemicals

A middle grade with higher assay and more impurity tests than LR, below a full AR specification, widely used for synthesis.

640 products in this grade

Extra Pure Grade products

289–312 of 640 products

Chromium(III) potassium sulphate, 98%

CAS: 7788-99-0
Formula: CrH₂₄KO₂₀S₂
MW: 499.4 g/mol

ZX-013602

Cinnamoyl chloride, extra pure >96%

CAS: 17082-09-6
Formula: C₉H₇ClO
MW: 166.6 g/mol

ZX-019104

Citric acid, anhydrous, 99%

CAS: 77-92-9
Formula: C₆H₈O₇
MW: 192.12 g/mol

ZX-007493

Citric acid, monohydrate, 99%

CAS: 5949-29-1
Formula: C₆H₁₀O₈
MW: 210.14 g/mol

ZX-007496

Cobalt sulphate, 98%

CAS: 10026-24-1
Formula: CoH₁₄O₁₁S
MW: 281.11 g/mol

ZX-013624

Cobalt(II) carbonate

CAS: 12602-23-2
Formula: C₂H₆Co₅O₁₂
MW: 516.73 g/mol

ZX-013628

Cobalt(II) chloride, hexahydrate, 99%

CAS: 7791-13-1
Formula: Cl₂CoH₁₂O₆
MW: 237.93 g/mol

ZX-013630

Comin's reagent (2-[N,N-bis(trifluoromethyl sulphonyl)amino]-5-chloropyridine), extra pure >98%

CAS: 145100-51-2
Formula: C₇H₃ClF₆N₂O₄S₂
MW: 392.7 g/mol

ZX-019158

Copper (II) ethylhexanoate solution (cu content ~8%), extra pure

CAS: 149-11-1
Formula: C₁₆H₃₀CuO₄
MW: 349.95 g/mol

ZX-037391

Copper(II)-ethylenediamine complex 1 M aq. soln puriss for synthesis [], extra pure

CAS: 14552-35-3

ZX-019105

Creatinine zinc chloride, extra pure 99%

CAS: 16045-72-0
Formula: C₈H₁₄Cl₂N₆O₂Zn
MW: 362.5 g/mol

ZX-018915

Crotononitrile, extra pure >99%

CAS: 4786-20-3
Formula: C₄H₅N
MW: 67.09 g/mol

ZX-019106

Cupric carbonate

CAS: 12069-69-1
Formula: CuCO₃.Cu(OH)₂
MW: 221.12 g/mol

ZX-013682

Cupric nitrate, 98%

CAS: 10031-43-3
Formula: CuH₆N₂O₉
MW: 241.6 g/mol

ZX-013687

Cupric oxide, 98%

CAS: 1317-38-0
Formula: CuO
MW: 79.55 g/mol

ZX-013690

Cupric sulphate, pentahydrate, 98%

CAS: 7758-99-8
Formula: CuH₁₀O₉S
MW: 249.69 g/mol

ZX-013697

Cuprous iodide, 99%

CAS: 7681-65-4
Formula: CuI
MW: 190.45 g/mol

ZX-013706

Cuprous oxide, red, 96%

CAS: 1317-39-1
Formula: Cu₂O
MW: 143.09 g/mol

ZX-013708

Cycloheptylamine, extra pure >99%

CAS: 5452-35-7
Formula: C₇H₁₅N
MW: 113.2 g/mol

ZX-019033

Cyclooctanol, extra pure >99%

CAS: 696-71-9
Formula: C₈H₁₆O
MW: 128.21 g/mol

ZX-019034

Cyclopentene, extra pure >96%

CAS: 142-29-0
Formula: C₅H₈
MW: 68.12 g/mol

ZX-019035

Cyclopentyl methyl ether, extra pure >99%

CAS: 5614-37-9
Formula: C₆H₁₂O
MW: 100.16 g/mol

ZX-037352

Cyclopropyl bromide, extra pure >99%

CAS: 4333-56-6
Formula: C₃H₅Br
MW: 120.98 g/mol

ZX-019036

Cyclopropylacetylene Stage-2, extra pure >97%

CAS: 2999-46-4
Formula: C₅H₇NO₂
MW: 113.11 g/mol

ZX-037342

Compare with other grades

HPLC Grade GC Grade AR Grade (Analytical Reagent)ACS Grade LR Grade (Laboratory Reagent)Molecular Biology Grade Spectroscopy Grade LC-MS Grade IP Grade (Indian Pharmacopoeia)BP Grade (British Pharmacopoeia)USP Grade (United States Pharmacopeia)Ph. Eur. Grade (European Pharmacopoeia)Food Grade (FCC)Technical Grade Electronic Grade Deuterated and Stable-Isotope-Labelled Compounds Pharmaceutical Secondary Reference Standards Grades guide

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