EPA Method 508 Surrogate Standard Back Catalog number: 19042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 96731 Triethylene glycol Price on request 57031 Gallium (Ga) Price on request C16173000 Phthalic acid, bis-2-ethylhexyl ester, certified, 0.5g Price on request