Apparent specific volume                            14～17 g/ml

Iodine absorption                                          90 g/kg min.

Hydrochloric acid absorption                     3.9 ml/g min.

Resistivity                                                     2.5 Ω．M max.

PH value                                                              6～8

Loss on heating                                                0.3 % max.

Ash content                                                        0.2 % max.

Grit content                                                      0.02 % max.

Impurities                                                                  NO