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

577–600 of 640 products

Sodium phosphate, tribasic, 98%

CAS: 10101-89-0
Formula: H₂₄Na₃O₁₆P
MW: 380.12 g/mol

ZX-013274

Sodium propionate, 98%

CAS: 137-40-6
Formula: C₃H₅NaO₂
MW: 96.06 g/mol

ZX-018409

Sodium selenate, extra pure

CAS: 13410-01-0
Formula: Na₂O₄Se
MW: 188.95 g/mol

ZX-037296

Sodium selenocyante, extra pure

CAS: 4768-87-0
Formula: CNNaSe
MW: 127.98 g/mol

ZX-019177

Sodium sulphide flakes, extra pure 58%

CAS: 1313-84-4
Formula: H₁₈Na₂O₉S
MW: 240.19 g/mol

ZX-019618

Sodium sulphide, flakes

CAS: 27610-45-3
Formula: Na₂S.xH₂O
MW: 78.04 g/mol

ZX-013294

Sodium sulphite, anhydrous, 98%

CAS: 7757-83-7
Formula: Na₂O₃S
MW: 126.05 g/mol

ZX-013297

Sodium tellurite, 98%

CAS: 10102-20-2
Formula: Na₂O₃Te
MW: 221.6 g/mol

ZX-013299

Sodium tetraborate, decahydrate, 99%

CAS: 1303-96-4
Formula: B₄H₂₀Na₂O₁₇
MW: 381.4 g/mol

ZX-013301

Sodium thiocyanate, 99%

CAS: 540-72-7
Formula: CNNaS
MW: 81.07 g/mol

ZX-013305

Soyabean meal, extra pure

CAS: 68308-36-1

ZX-018935

Stannic oxide, 99%

CAS: 18282-10-5
Formula: O₂Sn
MW: 150.71 g/mol

ZX-017477

Stannous oxalate, 98%

CAS: 814-94-8
Formula: C₂O₄Sn
MW: 206.73 g/mol

ZX-014412

Stannous oxide

CAS: 21651-19-4
Formula: OSn
MW: 134.71 g/mol

ZX-014413

Strontium carbonate, 99%

CAS: 1633-05-2
Formula: CO₃Sr
MW: 147.63 g/mol

ZX-013535

Strontium chloride, 99%

CAS: 10025-70-4
Formula: Cl₂H₁₂O₆Sr
MW: 266.62 g/mol

ZX-013541

Sulphanilamide, 99%

CAS: 63-74-1
Formula: C₆H₈N₂O₂S
MW: 172.21 g/mol

ZX-003751

Sulphur powder, 98%

CAS: 7704-34-9
Formula: S
MW: 32.07 g/mol

ZX-015273

Tartaric acid, 99%

CAS: 87-69-4
Formula: C₄H₆O₆
MW: 150.09 g/mol

ZX-007701

tert-Butyl chloroacetate, extra pure >97%

CAS: 107-59-5
Formula: C₆H₁₁ClO₂
MW: 150.6 g/mol

ZX-018991

tert-Butyl isocyanate, extra pure >97%

CAS: 1609-86-5
Formula: C₅H₉NO
MW: 99.13 g/mol

ZX-018993

tetra-Sodium pyrophosphate, anhydrous, 98%

CAS: 7722-88-5
Formula: Na₄O₇P₂
MW: 265.9 g/mol

ZX-013318

Tetrabutylammonium borohydride, extra pure >98%

CAS: 33725-74-5
Formula: C₁₆H₄₀BN
MW: 257.3 g/mol

ZX-019162

Tetraethyl ammonium hydroxide, extra pure 25%

CAS: 77-98-5
Formula: C₈H₂₁NO
MW: 147.26 g/mol

ZX-037425

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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