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Red phosphorus, stabilized and micro-encapsulated

Red Phosphorus HB 801 (TP)

Red Phosphorus HB 801 (TP) is a stabilized and micro-encapsulated red phosphorus grade. Red Phosphorus HB 801 (TP) is a fine red powder that is insoluble in water and organic solvents.
Product Data Sheet
  • Mostly inert against atmospheric influences due to the combination of chemical stabilization and micro-encapsulation 

  • High oxidation and thermal stability under atmospheric conditions 

  • Delivered as dry powder - very high phosphorus content  

  • Suitable for pyrotechnical application



The product reacts explosively with oxidizing agents. During decomposition or combustion yellow phosphorus and/or phosphorus pentoxide are formed.  
When processing is carried out, particularly at elevated temperatures, it should be borne in mind that small amounts of phosphine may be formed especially in the presence of water. As phosphine is a toxic gas, an effective extraction facility must be provided.  
Red Phosphorus HB 801 (TP) containers must be closed tightly whenever any of the content is removed. All handling operations must be carried out with due care, using only tools made from soft material (plastic, wood, etc.). Do not cut the metal bag closure or the bag itself.  
If fire breaks out, the most suitable extinguishing agents are water spray, foam, wet sand and fire blankets. Fire extinguishers that operate under gas pressure are not suitable because they tend to whip up the red phosphorus powder and thus cause the fire to spread.  
Areas where fires involving red phosphorus powder have been extinguished should be doused several times with 2% potassium permanganate or with 10% soda or copper sulphate solution to render harmless the toxic and spontaneously flammable yellow phosphorus formed during the fire.  
Any mechanical movement of Red Phosphorus HB 801 (TP) as well as all operations in which Red Phosphorus HB 801 (TP) is exposed to intense heat, pressure etc. should be carried out in an inert gas atmosphere (nitrogen or argon).  
Additional information is available in the special leaflet "Safety Precautions in Handling Red Phosphorus Powder Grades".  
For regulatory details such as the classification and labeling as dangerous substances or goods please and storage conditions please refer to our corresponding Material Safety Data Sheet. 
As stated in the safety data sheet of the substance the use “industrial manufacture of screening smoke ammunition or smoke payloads” is advised against within the EU according to the REACH regulation. Therefore, every manufacturer of smoke ammunition or smoke payloads is obliged to create a chemical safety assessment for these uses and to inform the ECHA accordingly. 


Hazard class Hazard category    H-phrase
Flammable solidsCategory 1 Flammable solid
Skin sensitisationCategory 1May cause an allergic skin reaction
Chronic aquatic toxicity  Category 3 Harmful to aquatic life with long lasting effects



Characteristics  Unit   Target Value   DS¹)TD²)Test Method 
Appearance   red powder

visual evaluation   
Chemical Formula   Px  

Phosphorus  % (w/w)   min. 95.0  

Gravimetry after oxidative dissolution
White Phosphorus  % (w/w)   < 0.02  

NMR-spectroscopic determination after extraction with CS2; (11/10)  
Density  g/cm³   approx. 2.0  

Bulk Density  g/cm³   0.8 - 1.2  

pH Value   approx. 7  

10% Suspension in acetone / water, potentiometry; (11/12)  
Particle Size Distribution  %(w/w)    

Wet sieving  
 > 400 µm   max. 0.1   
 > 100 µm  max. 3.0
 > 45 µm
max. 25.0     

Water content 

% (w/w)max. 0.5

Thermogravimetry at 130°C
¹) Delivery specification: The product is constantly monitored to ensure that it adheres to the specified values. Test methods: Clariant method numbers 11/xx in brackets.
²) Technical data: The technical data are used solely to describe the product and are not subject to regular monitoring.  

Owing to its special stabilization and microencapsulation Red Phosphorus HB 801 (TP) is suitable for pyrotechnical applications. Its combination of microencapsulation and stabilization allows a safer handling and higher product stability as compared to other RP grades. 

Packaging & Handling

Delivery form 
Red Phosphorus HB 801 (TP)  is supplied in 60 liter conical, full open-head steel drums with a 50 kg fill weight. Each drum contains 5 x 10 kg material packed in anti-static polyethylene bags and a ring-type lid closure.

Minimum shelf life is 12 months from the date of shipping when stored according to the said conditions.  

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