麻豆免费视频,波多野结衣vs黑人巨大,色翁荡息又大又硬又粗肖艳,国产毛片欧美毛片久久久,人人妻一区二区三区,成人无码精品1区2区3区免费看,国产精品久久午夜夜伦鲁鲁,巜被社长侵犯的人2中文在线,办公室H荡乳欲伦交换小喜,欧美内射深插日本少妇

Basic chemicals
Anhydrous sodium sulfate
Industrial salt
Aquafortis standard
Sodium nitrate
Sodium nitrite
Liquid ammonia
Dye intermediate
N,N-dimethylaniline
Agricultural products
Ammonium bicarbonate
Sodium Chloride
Sodium sulfate
Fine chemicals
Ethyl chloride
Packing
Plastic woven bag

N,N-dimethylaniline

N,N-dimethylaniline standard HG2-37583

Value	First grade	Second grade
Appearance	light yellow to yellow oily liquid
Assay , %≥	99.0	98.5
N-methylaniline Assay , %≤	0.5	0.7
Freeze point (dry ), °C≥	2.0	1.8
Aniline Assay , %≤	meet standard

[ Back ]