Why do I see ghost peaks with a new bottle of solvent?

Ghost peaks usually come from trace organics that concentrate on the column during equilibration and elute during the gradient. Switching to a gradient-tested HPLC grade, keeping bottles capped and avoiding plastic transfer lines normally removes them.

Does HPLC grade water exist?

Yes. HPLC grade water is specified for low TOC, low UV absorbance and low residue. Many laboratories produce their own with a purification system, but bottled water is useful for validation work or when the system is down.

How long does an opened bottle of HPLC acetonitrile stay usable?

There is no fixed rule, but once opened, solvents absorb water and airborne contaminants. Most laboratories set an in-use period of a few weeks to a few months based on their own baseline checks, and always keep the cap closed.

Chemical grade

HPLC Grade chemicals

Chromatography solvents purified and tested for low UV absorbance, low residue, low water and freedom from particles.

387 products in this grade

HPLC Grade products

265–288 of 387 products

Methane sulphonic acid sodium salt, for HPLC, 98%

CAS: 2386-57-4
Formula: CH₃NaO₃S
MW: 118.09 g/mol

ZX-000890

Methanol, for HPLC ≥99.9%

CAS: 67-56-1
Formula: CH₄O
MW: 32.04 g/mol

ZX-036997

Methanol, for HPLC, for spectroscopy ≥99.80%

CAS: 67-56-1
Formula: CH₄O
MW: 32.04 g/mol

ZX-038491

Methotrexate hydrate, ≥98% (HPLC), powder

CAS: 133073-73-1
Formula: C₂₀H₂₄N₈O₆
MW: 472.5 g/mol

ZX-011037

Methyl acetate, for HPLC 99%

CAS: 79-20-9
Formula: C₃H₆O₂
MW: 74.08 g/mol

ZX-001736

Methyl tert-butyl ether, for HPLC, 99.7%

CAS: 1634-04-4
Formula: C₅H₁₂O
MW: 88.15 g/mol

ZX-001737

MitoTEMPO, ≥98% (HPLC)

CAS: 1334850-99-5
Formula: C₂₉H₃₅ClN₂O₂P
MW: 510 g/mol

ZX-002905

MKT-077, ≥98% (HPLC)

CAS: 147366-41-4
Formula: C₂₁H₂₂ClN₃OS₂
MW: 432 g/mol

ZX-002906

ML162, ≥98% (HPLC)

CAS: 1035072-16-2
Formula: C₂₃H₂₂Cl₂N₂O₃S
MW: 477.4 g/mol

ZX-011420

mono-Chlorobenzene, for HPLC 99.9%

CAS: 108-90-7
Formula: C₆H₅Cl
MW: 112.55 g/mol

ZX-037252

MTSSL ≥98% (HPLC), nitroxide spin label probe, powder

CAS: 81213-52-7
Formula: C₁₀H₁₈NO₃S₂
MW: 264.4 g/mol

ZX-011665

N-Butyryl-DL-homoserine lactone, ≥96% (HPLC)

CAS: 98426-48-3
Formula: C₈H₁₃NO₃
MW: 171.19 g/mol

ZX-003365

n-Decyl sulphate sodium salt, for HPLC 99%+

CAS: 142-87-0
Formula: C₁₀H₂₁NaO₄S
MW: 260.33 g/mol

ZX-000763

n-Ethylmaleimide, ≥99% (HPLC)

CAS: 128-53-0
Formula: C₆H₇NO₂
MW: 125.13 g/mol

ZX-011676

n-Heptane, for HPLC, 99%+

CAS: 142-82-5
Formula: C₇H₁₆
MW: 100.2 g/mol

ZX-001742

n-Heptane, for HPLC, for spectroscopy 99%

CAS: 142-82-5
Formula: C₇H₁₆
MW: 100.2 g/mol

ZX-037031

n-Hexadecane sulphonic acid sodium salt anhydrous, AR, for HPLC

CAS: 15015-81-3
Formula: C₁₆H₃₃NaO₃S
MW: 328.5 g/mol

ZX-038126

n-Hexadecane sulphonic acid sodium salt, for HPLC 99%

CAS: 15015-81-3
Formula: C₁₆H₃₃NaO₃S
MW: 328.5 g/mol

ZX-000764

n-Hexane, for HPLC, 99%+

CAS: 110-54-3
Formula: C₆H₁₄
MW: 86.18 g/mol

ZX-001743

N-Hexanoyl-L-homoserine lactone, ≥96% (HPLC)

CAS: 147852-83-3
Formula: C₁₀H₁₇NO₃
MW: 199.25 g/mol

ZX-008102

N-Hydroxysulphosuccinimide sodium salt, ≥98% (HPLC)

CAS: 106627-54-7
Formula: C₄H₄NNaO₆S
MW: 217.13 g/mol

ZX-011679

N-Lauroylsarcosine sodium salt, for molecular biology, ≥99% (HPLC)

CAS: 137-16-6
Formula: C₁₅H₂₈NNaO₃
MW: 293.38 g/mol

ZX-003692

N-Methyl-2-pyrrolidone, for HPLC 99%+

CAS: 872-50-4
Formula: C₅H₉NO
MW: 99.13 g/mol

ZX-001744

N,N-Dimethyl formamide, for HPLC & UV Spectroscopy

CAS: 68-12-2
Formula: C₃H₇NO
MW: 73.09 g/mol

ZX-001738

Compare with other grades

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