Product Specific

• The Freezing Point of 50% Sodium Hydroxide
  What is the freezing point of 50% Sodium Hydroxide? Should be stored above 60° Fahrenheit to avoid freezing. ...read more
  
• Freezing Point of Glacial Acetic Acid
  What is the freezing point of Glacial Acetic Acid? Store above 60° Fahrenheit to avoid freezing ...read more
  
• Vapor Pressure of 49% Hydrofluoric Acid
  What is the Vapor Pressure (mmHg) of 49% Hydrofluoric Acid? 25 mmHg at 20° C ...read more
  
• Maximum Exposure to Acetic Acid
  What is the OSHA permissible exposure limit (PEL) of 99.9% Acetic Acid? 10 ppm (TWA) ...read more
  
• Density of IPA (2-Propanol)
  What is the density of IPA (2-Propanol)? 0.78 g/ml ...read more
  
• Ammonium Hydroxide coefficient of expansion
  Bulging or collapsing of ammonium hydroxide (ammonia) packages is normal and no cause for alarm Aqua ammonia solutions at 28 - 29% concentration boil around 85 deg F at atmospheric pressure. Strong aqua ammonia solutions have very large coefficients of expansion which are temperature dependent. The vapor pressure in the container is directly proportional to the temperature change. Puritan fills ammonium hydroxide at 70 deg F. So, if the container is filled at 70 deg F and the temperature rises to 90 deg F, the container will bulge. Likewise, if the same container is subjected to 50 deg F, the container will collapse. To correct the physical condition of the container:
  1. Put on the appropriate PPE (rubber apron, chemical splash goggles, gloves, etc.) 
  2. Place the container opening within close proximity to a point exhaust source.
  3. Carefully open one of the 2" bungs to equalize the pressure. ...read more
  
• Permissible Exposure Limit of N, N-dimethylaniline
  What is the OSHA permissible exposure limit of N, N-dimethylaniline? 5 ppm (TWA) ...read more
  
• Stability of 25% Tetra-Methyl Ammonia Hydroxide
  What is the stability of 25% Tetra-Methyl Ammonia Hydroxide? Stable under normal ordinary conditions of use and storage. Typically absorbs carbon dioxide from the air. ...read more
  
• Phosphoric Acid
  What is the freezing point of Phosphoric Acid? -17° C to –21° C ...read more
  
• Sulfuric Acid reacts with polyethylene over time
  Explanation of the process and result of the reaction of sulfuric acid with polyethylene Polyethylene containers are known to contain trace amounts of partially polymerized resin. The amount of partially polymerized resin is a function of resin quality and the container molding process. Concentrated sulfuric acid reacts with the partially polymerized resin in a two step process:
  1. Liquid oxidative degradation
  2. Diffusion of the sulfuric acid into the polymeric matrix
  
  This reaction may cause a discoloration (darkening) of the sulfuric acid and an increase in substances reducing permanganate which tends to progress over time. A six month shelf life provides a conservative time frame in order to maintain the ACS and SEMI specifications for color and substances reducing permanganate. ...read more