Serial number	Guideline name	First Grade	Second Grade
1	phosphorous ,%(m/m)	18.0	16%
2	Ca ,%(m/m)	28.0	24%
3	fluorides ,%	0.03	0.03%
4	arsenic ,%(m/m)	0.002	0.002%
5	Heavy metals%(m/m)	0.003	0.003%