Topic : รบกวนสอบถามค่ะ
จากคุณ  :  เจนนี่   [ 7/31/2009 10:26:31 AM]
cetric acid ถือเป็นวัตถุอันตรายหรือเปล่าค่ะ ถ้าเป็นเป็นชนิดที่เท่าไร

จากคุณ : ช่วยตอบ    [8/10/2009 1:13:20 PM]

ถ้าเป็น citric acid จะไม่เป็นวัตถุอันตราย แต่ถ้าเป็นacetic acid ต้องดูที่เปอร์เซ็นต์ด้วย ถ้ามากกว่า 80 เป็นค่ะ


จากคุณ : safsa    [14/3/2558 13:53:12]

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