Solvents -- Methanol

Specification Comparison
Methanol Specification Comparison PDF version (124 kb)

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,
simply click on the product numbers above!


CHROMASOLV® Mobile Phase Blends for HPLC & LC-MS Applications