Mixture of Isomers, Specification Comparison chart by Sigma-Aldrich.

Sigma-Aldrich Hexane Specifications Comparison Mixture of isomers
	CHROMASOLV Plus	CHROMASOLV for HPLC	Anhydrous	ACS Spectro- photometric	ACS
Purity	≥98.5%	≥98.5%	≥99%	≥98.5%	≥98.5%
UV Absorption
λ: 195 nm	≤1.00	≤1.00		≤1.00
λ: 210 nm		≤0.30		≤0.30
λ: 220 nm		≤0.10		≤0.10
λ: 225 nm	≤0.05
λ: 230 nm		≤0.05		≤0.05
λ: 240 nm		≤0.02		≤0.02
λ: 250 nm	≤0.01	≤0.01
λ: 260 nm				≤0.01
λ: 275 nm	≤0.005
λ: 300 nm	≤0.005
λ: 400 nm		≤0.01		≤0.01
Total Impurities
Water	≤0.01%	≤0.02%	≤0.001%	≤0.02%
Water			≤0.005% (100mL)
Evaporation Residue	≤0.0001%	≤0.0005%	≤0.0005%	≤0.0005%	≤0.001%
Halogenated Residue	≤10 ng/L (as Heptachlor epoxide)
Fluorescence 365 nm	≤1.0 ppb
Titratable acid		0.0003 meq/g		0.0003 meq/g	0.0003 meq/g
Sulfur compounds		≤0.005%		≤0.005%	≤0.005%
Thiophene		Passes Test		Passes Test	Passes Test
Packaging Options
	CHROMASOLV Plus	CHROMASOLV for HPLC	Anhydrous	ACS Spectro- photometric	ACS
Glass Bottle	650544	293253		156175	178918
PVC Coated Bottle	650420	439185			320315
Sure/Seal^™			227064
Aluminum Bottle					676799
NOWPAK^™		439185
Pure-Pac^™		293253	227064
Carbon Steel					178918
Drum		439185			178918

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Isomer Specification