Safety classification

Lower flammability limits (LFL) are expressed as vol % in dry ambient air. No entry means ASHRAE Safety Classification (2) (see Fig. 3). NR = not rated. 

ANSI/ASHRAE Standard 34-1992, Number Designation and Safety Classification of Refrigerants ... 

This standard provides an unambiguous system for numbering refrigerants and assigning composition-designating prefixes for refrigerants. Safety classifications based on toxicity and flammability data are included. [from Section... 

Held open for future use, formerly used as an indicator of the provisional status of safety classifications. ... 

Table 11-3B (continued) Refrigerant Data and Safety Classifications... 

Refrigerant/Refrigerant Blend Data and Safety Classifications for Common Refrigerants... 

Safety Classification for Pyrotechnic Materials in a MIGRAD Mixer ... 

It is important and worthwhile to spend time edncating project participants about the kinds of lasers nsed, their power, safety classifications, proper handling and operation, and risks [22-24]. Ample free edncational resonrces are available on the internet. Operations and maintenance personnel must receive regular laser... 

Determining the physical and chemical properties of hydrogen and whether they a re accurately reflected in hydrogen s safety classification. 

Deton velocities were confirmed using high vel framing cameras. The author concludes that the w content conditions of the test prevail in expl mfg plants after expl washing and filtering. He recommends that these expls be assigned a safety classification of Class 9 at this step in their processing... 

Safety Classification Handling Experience and Application to Space Shuttle Payload , NASA Cr 145185 (1977) 83) Table 6 below... 

Pennington D.F., Man T. and Persons B., "Rocket Propulsion Hazard Summary Safety Classification. Handling Experience and Application to Space Schuttle Payload", NASA CR-145185 (1977)... 

Pulsed lasers are more hazardous than CW lasers because the eye cannot react in the time of a laser flash. The ANSI Z136.1 safety classification scheme used for pulsed lasers... 

Industry must generate data on their own chemicals, and assign appropriate hazard and safety classifications in accordance with guidelines laid out in the Directive. Summaries of the infcMmation must be provided to the Commission, and subsequently to other Member States. The United Kingdom currently receives aj roximately 70 full notifications each year [6]. About 40% of these have been classified as dangerous to health in some way. 

ASHRAE (2007). ANSI/ASHRAE Standard 34-2007 Designation and Safety Classification of Refrigerants, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Atlanta, GA. 

The original edition classified botanical ingredients in four safety classifications to differentiate those that can be safely consumed when used appropriately from those for which some contraindication or other restriction is known, as well as those that should be used only under the guidance of a qualified expert. A handful of entries in that edition were also placed in a separate class if the editors had insufficient data for classification. The revised edition largely retains this safety classification system, except that if the review process did not provide enough information to make a knowledgeable decision on any specific herb, that species was removed from the text. 

Safety or toxicity concerns based on isolated constituents. As is the case with many common foods, some herbs are known to contain constituents that, in isolation, exhibit toxicity. Data based solely on constituents are not considered relevant to safety classification except in those cases where such compounds are known to accumulate, or where consumption patterns are sufficient to provide cause for health concerns. The presence of a constituent has been identified in a Notice if knowledge of the constituent is relevant to the safe use of an herb. 

Traditional Chinese and Ayurvedic contraindications. In Chinese and Ayurvedic therapeutic traditions, most herbs have contraindications based on an individual s constitutional strengths and weaknesses, seasons, climate, and other factors that can only be understood in the context of the specific tradition. These traditional concerns have not been included in the text unless they can also be interpreted in a modern biomedical context, such as contraindication in pregnancy. Gastrointestinal disturbances. Reports of nausea or emesis from excessive doses, or occasional and/or minor gastrointestinal disturbances, have been noted but have not been considered in establishing safety classification, unless frequency or severity of such reactions warrants consideration. 

Idiosyncratic reactions. Any plant substance, whether used as food or medicine, has the potential to stimulate a negative response in unpredictably sensitive individuals. Safety classifications do not take into account such idiosyncratic responses, unless there is evidence to suggest that such an idiosyncratic reaction may be predictable. 

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