Sodium hydroxid,with the chemical formula NaOH, is commonly known as caustic soda. It is a strong alkali with strong corrosivity, generally in the form of flakes,pearls or lumps.Industrial grade Caustic Soda contains a small amount of sodium chloride and sodium carbonate, and is white translucent crystal.Its aqueous solution has an astringent and creamy feel.Sodium hydroxide is prone to deliquescent in the air, so solid sodium hydroxide is often used as a desiccant.It is very soluble in water and emits a lot of heat when dissolved. It`s also soluble in ethanol and glycerin.
Sodium hydroxide (NaOH) is extremely versatile. Used in the production of paper, soap, dyes, rayon, metal smelting, petroleum refining, cotton fabric finishing, coal tar product purification, and food processing, wood processing and machinery industries.
The product is a strongly alkaline substance which belong to 8 grade dangerous goods. with strongly irritating and corrosive, dust or smoke can irritate the eyes and respiratory tract, corrode the nasal septum, direct contact between the skin and eyes and NaOH can cause burns, and misuse can cause digestive tract burns, mucosal erosion, bleeding and shock.So it`s highly corrosive and requires the "corrosive item" mark.
Caustic Soda,Caustic Soda Flake,Caustic Soda Chemical,Detergent Caustic Soda HENAN JINHE INDUSTRY CO.,LTD , https://www.hntitaniumdioxide.com
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Beijing road collapsed after long-term immersion rainwater diesel generators | diesel generators price / 2012-08-01
The road continues to collapse and there is no danger
Pavement collapse after frequent rain
The continuous rain from morning to night, while nourishing the city of Beijing, also tests the roads of this city. For Beijing roads that are accustomed to "thirsty water", the sudden soaking of rain for a long time will surely bring about "discomfort". While appealing to the relevant departments to strengthen supervision and timely repairs, we also reminded you to take extra care and take care of yourself in the rain. Do not hold your luck and always remember safety first.
Xicheng District
Buttonhole Hut Emerges Big Hole
A car is almost "pit"
Yesterday (31st), at 2pm, the road surface collapsed at Dean Bell Hutong in Xicheng District. A car passing through here is almost in the pit. The staff involved in the repairs stated that the road surface collapse may be related to the rupture of the sewer pipe below the road surface and the sedimentation of the soil after the rain. The reporter saw on the scene this morning that the collapsed surface has been repaired.
Yesterday afternoon, the reporter went to Dean Bell Hutong and saw a large pit about 2 meters long, about 1 meter wide, and about 1.5 meters deep. Residents living in the neighborhood said that the roads are still good when they go out in the morning. "There was a puddle there, but there was no hole in the pavement." When the time came around 2 pm, the road suddenly collapsed. Several witnesses around said that a small car had passed and the road suddenly broke down. "Fortunately, the car is going fast, and it's over, otherwise it must have fallen into it."
At 4 o'clock yesterday afternoon, the repair personnel started repairing the road surface. They first excavated the road with an excavator to find the cause of the collapse. The repair personnel said that the preliminary judgment was due to the breakdown of the underground sewage pipeline, which caused the road surface to settle. In addition, road collapse has also been related to successive days of rainfall.
As the collapse site was located on the south side of the Dehua Bell alley, after the repairs began, the road on the south side was temporarily closed, leaving only the north side road for the passage of cars and pedestrians. The reporter found that the road surface at the collapsed location is slightly darker than the surrounding area. Nearby residents said that this position of collapsed roads had been dug up and repaired sewage pipes last year. Repair personnel said that they could be repaired that night.
Chaoyang District
Wangjing area road collapse
Construction workers backfill in time
Around 5 o'clock this morning, a road collapse occurred at the intersection of Wanghua Road and Huajiadi Street in Chaoyang District. The area of ​​collapse was about 4 square meters. The pits on the road did not affect the traffic. A construction site of the Beijing Urban Construction Group was only 10 meters away from the collapse, and site construction workers backfilled the collapsed area this morning.
At about 7 o'clock this morning, the reporter saw at the scene that the road surface collapsed to a depth of about 1.5 meters, and a perimeter fence had been set up around the collapse site. The construction workers of the Beijing Urban Construction Group are taking light rain to inspect the collapse site. By 9:00 am, the rainfall suddenly increased. The construction workers braved the heavy rain to watch the scene, dredge pedestrians across the road, and prepared to backfill the road. At this time, the number of vehicles on this section of the road increased significantly, and vehicles on the north and south of Wanghua Road need to avoid the trap when passing vehicles.
According to Mr. Zhang’s introduction by the public, at 7 o’clock in the morning, he took a bus to pass through here and found that the road collapsed. Fortunately, the pit did not appear in the middle of the road. At that time, a fence had been set around the cave, but no one had repaired it.
The nearby resident, Mr. Wang, said that at about 5 o'clock in the morning, when the rain was not too big, he took a squeaky look. When he came back, he discovered that there was a big hole on the road. At that time, no vehicles were trapped.
A staff member at the scene of the Beijing Urban Construction Group stated that the heavy rain in the Wangjing area has continued, and it is likely that excessive rainfall caused the loss of soil under the road surface, which led to collapse. Fortunately, no vehicles were trapped in the pit. After the construction workers found that the road surface collapsed, they set up a fence nearby to ensure the safety of pedestrians. The road surface backfill will also be responsible for the Urban Construction Group. After inspection, the road collapse does not involve damage to the pipelines under the road and it can be directly backfilled.
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