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外観
本品は無色澄明の液で，刺激性の特異なにおい及び酸味
がある．
本品は水，エタノール(95)又はグリセリンと混和する．
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定義
本品は、次の化学式で表される有機酸である。
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化粧品の成分用途
pH調整剤、香料
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確認試験
本品は青色リトマス紙を赤変し，酢酸塩の定性反応
〈1.09〉を呈する．
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定量法
本品5mLを正確に量り，水30mLを加え，1mol/L水酸
化ナトリウム液で滴定〈2.50〉する(指示薬：フェノールフタ
レイン試液2滴)．
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純度試験
(１) 塩化物 本品20mLに水40mLを加えて試料溶液とす
る．試料溶液10mLに硝酸銀試液5滴を加えるとき，液は混
濁しない．
(２ ) 硫酸塩 (1)の試料溶液10mLに塩化バリウム試液
1mLを加えるとき，液は混濁しない．
(３) 重金属〈1.07〉 本品10mLを水浴上で蒸発乾固し，残
留物に希酢酸2mL及び水を加えて50mLとする．これを検液
とし，試験を行う．比較液は鉛標準液3.0mLに希酢酸2mL
及び水を加えて50mLとする(3ppm以下)．
(４) 過マンガン酸カリウム還元性物質 (1)の試料溶液
20mLに0.02mol/L過マンガン酸カリウム液0.10mLを加える
とき，液の赤色は30分以内に消えない．
(５) 蒸発残留物 本品30mLを水浴上で蒸発乾固し，
105℃で1時間乾燥するとき，その量は1.0mg以下である．
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使用
Pharmaceutic aid (acidifying
agent).
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健康ハザード
Recommended Personal Protective Equipment: Protective clothing should be worn when skin contact can occur. Respiratory protection is necessary when exposed to vapor. Complete eye protection is recommended; Symptoms Following Exposure: Breathing of vapors causes coughing, chest pains, and irritation of the nose and throat; may cause nausea and vomiting. Contact with skin and eyes causes burns; General Treatment for Exposure: INHALATION: Move the victim immediately to fresh air. If breathing becomes difficult, give oxygen and get medical attention immediately. INGESTION: If the victim is conscious, have him drink water or milk. Do not induce vomiting. SKIN OR EYE CONTACT: Flush immediately with lots of clean running water; wash eyes for at least 15 min. and get medical attention as quickly as possible; remove contaminated clothing; Toxicity by Inhalation (Threshold Limit Value): 10 ppm; Short-Term Exposure Limits: 40 ppm for 5 min.; Toxicity by Ingestion: LD50 0.5 to 5.0 g/kg (rat); Late Toxicity: No data; Vapor (Gas) Irritant Characteristics: Vapors cause moderate irritation such that workers will find high concentrations very unpleasant. Effects are temporary; Liquid or Solid Irritant Characteristics: This is a fairly severe skin irritant; may cause pain and secondary burns after a few minutes of contact; Odor Threshold: 1.0 ppm.
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化学反応性
Reactivity with Water No reaction; Reactivity with Common Materials: Corrosive, particularly when diluted. Attacks most common metals including most stainless steels. Excellent solvent for many synthetic resins or rubber; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Dilute with water, rinse with sodium bicarbonate solution; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
