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

481–504 of 640 products

Papain, purified

CAS: 9001-73-4

ZX-002682

PAR, indicator, extra pure

CAS: 16593-81-0
Formula: C₁₁H₁₀N₃NaO₃
MW: 255.2 g/mol

ZX-037461

Pentafluorothiophenol, extra pure >97%

CAS: 771-62-0
Formula: C₆HF₅S
MW: 200.13 g/mol

ZX-019180

Peppermint oil, purified by rectification

CAS: 8006-90-4

ZX-018497

Peppermint oil, purified by triple-distillation

CAS: 8006-90-4

ZX-018498

Phenol, 99%

CAS: 108-95-2
Formula: C₆H₆O
MW: 94.11 g/mol

ZX-003379

Phenylmethanesulphonyl fluoride, 99%

CAS: 329-98-6
Formula: C₇H₇FO₂S
MW: 174.19 g/mol

ZX-002691

Phosphorous pentoxide, 98%

CAS: 1314-56-3
Formula: O₅P₂
MW: 141.94 g/mol

ZX-000922

Pib-acid (methyl-4-(5-(4-(pentyloxy)phenyl)-3-isoxolyl)benzoate, extra pure >95%

CAS: 179162-55-1
Formula: C₂₁H₂₁NO₄
MW: 351.4 g/mol

ZX-019227

Pinacolborane, extra pure >97%

CAS: 25015-63-8
Formula: C₆H₁₂BO₂
MW: 126.97 g/mol

ZX-018939

Piperidineacetonitrile, extra pure >98%

CAS: 3010-03-5
Formula: C₇H₁₂N₂
MW: 124.18 g/mol

ZX-019173

Potassium acetate, 99%

CAS: 127-08-2
Formula: C₂H₃KO₂
MW: 98.14 g/mol

ZX-013041

Potassium bicarbonate, 99%+

CAS: 298-14-6
Formula: CHKO₃
MW: 100.11 g/mol

ZX-013047

Potassium bromate, 99%

CAS: 7758-01-2
Formula: BrKO₃
MW: 167 g/mol

ZX-013051

Potassium bromide, 99%

CAS: 7758-02-3
Formula: BrK
MW: 119 g/mol

ZX-013054

Potassium carbonate, 99%

CAS: 584-08-7
Formula: CK₂O₃
MW: 138.21 g/mol

ZX-013059

Potassium citrate, tribasic, 99%

CAS: 6100-05-6
Formula: C₆H₇K₃O₈
MW: 324.41 g/mol

ZX-013073

Potassium cyanide, extra pure 96%

CAS: 151-50-8
Formula: CKN
MW: 65.12 g/mol

ZX-018927

Potassium dichromate, 99%

CAS: 7778-50-9
Formula: Cr₂K₂O₇
MW: 294.18 g/mol

ZX-013075

Potassium ethylmalonate, extra pure >99%

CAS: 6148-64-7
Formula: C₅H₇KO₄
MW: 170.2 g/mol

ZX-019019

Potassium hexamethyldisilazide solution, 0.5 M in Toluene, extra pure

CAS: 40949-94-8
Formula: C₆H₁₈KNSi₂
MW: 199.48 g/mol

ZX-037434

Potassium hydrogen phthalate, 99%

CAS: 877-24-7
Formula: C₈H₅KO₄
MW: 204.22 g/mol

ZX-013086

Potassium hydrogen sulphate, 99%

CAS: 7646-93-7
Formula: HKO₄S
MW: 136.17 g/mol

ZX-013088

Potassium hydrogen tartrate, 99%

CAS: 868-14-4
Formula: C₄H₅KO₆
MW: 188.18 g/mol

ZX-007633

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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