High Purity Graphite (PH Value 7) With the aim to satisfy the demand of low microelement, high carbon content graphite from our oversea customers; our company developed High Purity Graphite using Acid-Alkali Method. By removing the impurities, our High Purity Graphite is ideal raw material to produce Expandable Graphite, which expansion ratio can reach up to 600 ml/g. The quality of this product is extremely consistent as its raw material comes from the same mine and is manufactured in the same product line under strict quality control. Simple technology parameter: 32 mesh -100 mesh Fixed Carbon: more than 94-99.9% PH Value: 7 Particle size screen oversize: more than 80% Moisture: less than 0.5% S: less than 200 ppm Cl: less than 50 ppm Fe: less than 500 ppm F: less than 50 ppm Mica: 0 ppm Quartz: 0 ppm The above technical indexes can be adjusted according to the user's different requirements.