Possible impurities. The systematic name of aspirin is 2-ethanoylhydroxybenzoic acid. We usually make it by the esterification of 2-hydroxybenzoic acid (salicylic acid) using ethanoic anhydride and a catalyst such as concentrated sulphuric acid or phosphoric acid.
TxDMV Â» Motor Carriers Â» Oversize / Overweight Permits. Vehicles and loads that exceed legal size or weight limits need an oversize/overweight (OS/OW) permit and route from the TxDMV to travel on Texas roads.
Determine if a permit is required. Single trip permit information. Multiple trip permit information. Sign up for OSOW permit updates. Implements of Husbandry information (IoH) Fluid milk product. Hours of operation for permitted vehicles. Escort, lighting, flagging and signage requirements.