Methanol Specification Comparison

Sigma-Aldrich Methanol Specifications Comparison
	CHROMASOLV LC-MS	CHROMASOLV Plus	CHROMASOLV Gradient	CHROMASOLV for HPLC	Biotech	Anhydrous	ACS Spectro- photometric	ACS	ReagentPlus
Purity	≥99.9%	≥99.9%	≥99.9%	≥99.9%	99.93%	99.8%	≥99.9%	≥99.8%	≥99%
UV Absorption
λ: 203 nm		≤1.00			≤1.00		≤1.00
λ: 205 nm		≤1.00					≤1.00
λ: 210 nm	≤0.52	≤0.80	≤0.50	≤0.50	≤0.60		≤0.80
λ: 220 nm	≤0.30	≤0.20	≤0.30	≤0.30	≤0.30		≤0.40
λ: 230 nm	≤0.12	≤0.10			≤0.15		≤0.20
λ: 235 nm			≤0.10	≤0.10
λ: 240 nm					≤0.05		≤0.10
λ: 250 nm		≤0.02
λ: 260 nm	≤0.009		≤0.01	≤0.01	≤0.01		≤0.04
λ: 280 nm							≤0.01
λ: 400 nm		≤0.005			≤0.01		≤0.01
Gradient analysis
230 nm	≤2 mAU	≤2 mAU	≤2 mAU		≤2 mAU
254 nm		≤5 mAU	≤5 mAU		≤5 mAU
Total Impurities
Water	≤0.02%	≤0.05%	≤0.02%	≤0.03%	≤0.02%	≤0.002%	≤0.10%	≤0.10%
						≤0.005% (100mL)
Evaporation Residue	≤0.0005%	≤0.0002%	≤0.0005%	≤0.0005%	≤0.0003%	≤0.0003%	≤0.001%	≤0.001%
Halogenated Residue		≤10 ng/L (as Heptachlor epoxide)
Fluorescence 254 nm	≤1.0 ppb	≤1.0 ppb	≤1.0 ppb	≤1.0 ppb
Fluorescence 365 nm	≤1.0 ppb	≤1.0 ppb	≤1.0 ppb	≤1.0 ppb
LC-MS suitability	passes test
Alkalinity	≤0.0005% (NH3)		≤0.00035% (NH3)
Acetaldehyde		≤0.001%					≤0.001%	≤0.001%
Acetone		≤0.001%					≤0.001%	≤0.001%
Titratable acid	≤0.001% free acid (as HCOOH)	0.0003 meq/g			0.0003 meq/g		0.0003 meq/g	0.0003 meq/g
Titratable base		0.0002 meq/g			0.0002 meq/g		0.0002 meq/g	0.0002 meq/g
Formaldehyde		≤0.001%					≤0.001%	≤0.001%
Silver	0.1 ppm
Aluminum	0.5 ppm
Barium	0.1 ppm
Calcium	0.1 ppm
Cadmium	0.05 ppm
Cobalt	0.02 ppm
Chromium	0.02 ppm
Copper	0.01 ppm
Iron	0.1 ppm
Potassium	0.1 ppm
Magnesium	0.1 ppm
Manganese	0.01 ppm
Sodium	0.1 ppm
Nickel	0.02 ppm
Lead	0.02 ppm
Tin	0.1 ppm
Zinc	0.1 ppm
Packaging Options
	CHROMASOLV LC-MS	CHROMASOLV Plus	CHROMASOLV Gradient	CHROMASOLV for HPLC	Biotech	Anhydrous	ACS Spectro- photometric	ACS	ReagentPlus
Glass Bottle	34966	646377	34885	34860			154903	179337	179957
PVC Coated Bottle		650609	439193					320390
Sure/Seal™					494437	322415
Aluminum Bottle								676780
VerSA-Flow™			439193					320390
NOWPAK™			439193
Pure-Pac™			34885	34860		322415
Carbon Steel								179337	179957
Drum			439193					179337

For a complete list of all available unit sizes and product specifications,
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CHROMASOLV® Mobile Phase Blends for HPLC & LC-MS Applications