EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended T536805 p-Tolyl Sulfate Potassium Salt, 1g Price on request 70936 Dichlorprop methyl ester Price on request 12058.11-5MG (+/-)-Methocarbamol-d3 (methoxy-d3),neat,neat,5mg Price on request