CAS: 7446-09-5; Sulfur Dioxide

• ⚠️危险化学品目录(2015年版) 加压气体
• 英文名称Sulfur Dioxide
• 中文名称二氧化硫
• IUPAC名称sulfur dioxide
• 其它别名Sulfursuperoxide (6CI); Fermenticide liquid; Sulfur dioxide (SO2); Sulfuroxide; Sulfur oxide (SO2); Sulfurous acid anhydride; Sulfurous anhydride; Sulfurous oxide; Sulphur dioxide
• CAS编号7446-09-5
• MFCD编号:MFCD00011450
• EINECS号:231-195-2
• 分子式:O2SLewis structure
• 分子量:64.06
• 产品CID: 2498286
• 产品分类无机化工 → 无机盐 → 氧化物和过氧化物 → 非金属氧化物和过氧化物

• 相似结构搜索
• 产品信息参考;
• InChIKey: RAHZWNYVWXNFOC-UHFFFAOYSA-N
• 1S/O2S/c1-3-2…
• 计算化学: 氢键受体数*氢键供体数*可旋转键数*

物理性质

• 熔点-75.5 °C
• 沸点-10.05 °C
• 密度2.811E-3 g/cm3
• PSA:66.23
• LogP:0.4106
• 折射率1.51
• 蒸汽压2530 mmHg at 25 °C
• 溶解性10 % (NIOSH, 2024) | In water, 1.07X10+5 mg/L at 21 °C | Soluble in water | In water: 17.7% at 0 °C; 11.9% at 15 °C; 8.5% at 25 °C; 6.4% at 35 °C | Soluble in water ... forms sulfurous acid (H2SO3) | For more Solubility (Complete) data for Sulfur dioxide (7 total), please visit the HSDB record page. | 107 mg/mL at 21 °C | Solubility in water, ml/100ml at 25 °C: 8.5 | 10%
• 敏感性SULFUR DIOXIDE is acidic. Reacts exothermically with bases such as amines, amides, metal oxides, and hydroxides. Frequently used as a reducing agent although it is not a powerful one. Acts as a reducing bleach to decolorize many materials. Can act as an oxidizing agent. Supports combustion of powdered aluminum [Mellor 5:209-212 1946-47]. Reacts explosively with fluorine [Mellor 2:1 1946-47]. Supports burning of manganese [Mellor 12:187 1946-47]. Readily liquefied by compression. Contact between the liquid and water may result in vigorous or violent boiling and extremely rapid vaporization. If the water is hot an explosion may occur. Pressures may build to dangerous levels if the liquid contacts water in a closed container [Handling Chemicals Safely 1980]. Supports incandescent combustion of monocesium acetylide, monopotassium acetylide, cesium oxide, iron(II) oxide, tin oxide, and lead oxide [Mellor]. Ethylene oxide and SO2 can react violently in pyridine solution with pressurization if ethylene oxide is in excess (Nolan, 1983, Case History 51).
• 外观形态无色无色气体
• 产品应用二氧化硫(7446-09-5)的用途:二氧化硫是我国允许使用的还原性漂白剂.对食品有漂白作用,对植物性食品内的氧化酶有强烈的抑制作用.我国规定可用于葡萄酒和果酒,最大使用量0.25g/kg,残留量不得超过0.05g/kg.也作漂白剂;防腐剂;抗氧化剂;防褐变剂.二氧化硫(7446-09-5)的作用机理:二氧化硫吸入人体后,在呼吸道粘膜表面与水作用,生成亚硫酸,再经氧化生成硫酸,直接刺激呼吸道粘膜.大量吸入后,可引起肺充血,肺水肿,以至反射性喉头痉挛,且窒息致死.
• 性质描述二氧化硫(7446-09-5)的性状:1,常温下为无色气体,有刺激性气味.2,密度2.26,沸点－10°C,熔点-72.7°C.3,易溶于水,乙醇,甲醇,醚及氯仿中.4,渗透性强,能较快地透入各种缝隙,也易被物品吸附,特别是潮湿的物品.5,从织物上消失很慢;依织物性质的不同,消散要6～25天.6,能使织物退色,变质,书籍失去光泽,还腐蚀金属,使食品不能吃.二氧化硫(7446-09-5)的毒性:对小白鼠的致死量:当空气中浓度为1.6mg/L时,5小时死亡;2mg/L时,20分钟死亡:对大鼠的致死量为2.6mg/L,20分钟死亡.二氧化硫对人有毒,空气中最高允许浓度为15mg/m3.

MSDS等安全信息

• GHS符号GHS04,GHS05,GHS06
• 危险类别It may cause death or permanent injury after very short exposure to small quantities. 1,000 ppm causes death in from 10 minutes to several hours by respiratory depression. It is an eye and respiratory tract irritant. Persons with asthma, subnormal pulmonary functions or cardiovascular disease are at a greater risk. (EPA, 1998) | · TOXIC and/or CORROSIVE; may be fatal if inhaled, ingested or absorbed through skin. | · Vapors are extremely irritating and corrosive. | · Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. | · Fire will produce irritating, corrosive and/or toxic gases. | · Runoff from fire control or dilution water may cause environmental contamination.
• 警示词Danger
• 危险描述H280-H314-H331
• 防范说明P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P410+P403
• 危险等级2.3
• UN编号1079
• 危险品标志T:有毒物质
• 安全声明S9:保持容器在一个有良好通风放的场所.S26:万一接触眼睛,立即使用大量清水冲洗并送医诊治.S45:出现意外或者感到不适,立刻到医生那里寻求帮助(最好带去产品容器标签).S36/37/39:穿戴合适的防护服,手套并使用防护眼镜或者面罩.
• 危险类别码R23:吸入有毒.R34:会导致灼伤.

上下游产品

合成工艺路线路线简述

• 合成目标产物 Sulfur Dioxide 主要起始原料 Sodium:Cyanide And Pentafluoroallyl Fluorosulfate
• (文献来源)合成步骤主要原料 Sodium:Cyanide 和 Pentafluoroallyl Fluorosulfate

其他信息查阅

• ➥ 象形图和危险代码
• ➥ 防范代码详解
• ➥ 危险代码说明
• ➥ Globally Harmonized System
• ➥ REACH监管