A unique, 2-piece valve prevents pressure build-up of solvents within these right-to-know safety-labeled wash bottles and allows dispensing with bottle upright or inverted. Unique valve design prevents pressure build-up. LDPE construction. Polypropylene closures and venting assembly. Vented for safety. Volatiles are vented to eliminate solvent drips. Labeled with six of the most commonly used solvent names or label your own. Use only with solvents compatible with LDPE. Custom labeling is available. Bottles are low-density polyethylene with polypropylene closures and venting assembly. They are pre-printed with the chemical name and formula, the National Fire Protection Association (NFPA) Section 704 Four-color Diamond, health hazards, Chemical Abstract System (CAS) number and suggested protective clothing and equipment. Certifications: Provides compliance with OSHA requirements outlined in hazard communication standard 29 CFR 1910.1200.