四氮唑乙酸 CAS:21732-17-2 Original price:300 Promotional price:200
4-(二乙氨基)-2-甲基苯甲 CAS:92-14-8 Original price:500 Promotional price:300
1外观:无色至钱棕色液体
2含量:99%
3苯酚:≤1.0%