NFPA is the world’s leading resource on fire, electrical, and related hazards. NFPA is a self-funded nonprofit dedicated to eliminating loss through knowledge.

As part of its commitment to enhancing public safety, NFPA makes its codes and standards available online to the public for free. Online access to NFPA's consensus documents conveniently places important safety information on the desktops of traditional users as well as others who have a keen interest.

NFPA 704 safety squares on containers of ethyl alcohol and acetone. "NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response" is a standard maintained by the U.S.-based National Fire Protection Association.

2013年4月11日 · Official Recognized NFPA 704 Symbols. W (with line accross): Materials that react violently or explosively with water. OX: Materials that possess oxidizing properties. Optional Symbol. SA: Materials that are simple asphyxiant gases (includes nitrogen, helium, neon, argon, krypton, and xenon). Non-Standard Symbols

NFPA 704是美国消防协会（National Fire Protection Association，简称NFPA）制定的危险品紧急处理系统鉴别标准。 它提供了一套简单判断化学品危害程度的系统，并将其用蓝、红、黄、白四色的警示菱形来表示。

Virtually every building, process, service, design, and installation is influenced by NFPA codes and standards. Our 300+ codes and standards are informed by rapidly changing industry needs and ever-evolving technologies, and are supported by scientific research, development, and practical experience from subject matter experts.

NFPA 704 Symbols Standard System for the Identification of the Hazards of Materials for Emergency Response This label can help you quickly identify the risks posed by hazardous materials you may encounter when entering rooms, buildings, or …

Explore the background of the NFPA diamond, its colors, numbers and legends, as well as sizing and placement as recommended by the NFPA 704 Standard. [1] The NFPA diamond alerts emergency responders to the presence of hazardous materials and their potential effects, and helps them plan an appropriate emergency response.

Pre-printed pressure-sensitive black numbers and W water symbols can be easily applied to NFPA® (National Fire Protection Association) labels to identify numerical ratings for Blue health, Red flammability, Yellow instability and White diamond at the bottom of the label, conveys Special Hazard information. This information is conveyed by use ...

The purpose of the NFPA rating is to advise emergency response personnel via the hazard diamond sticker of hazards they may encounter when entering the room in response to fire or other situations. Chemical substances are rated for degree of HEALTH RISK (blue diamond), FLAMMABILITY (red diamond), REACTIVITY (yellow diamond), on a scale of 0 to 4.