The molecular formula is c7h12o2; CH2CHCOO(CH2)3CH3, molecular weight 128. 17, colorless liquid; Steam pressure1.33kpa/35.5℃; Flash point 37℃; Melting point-64.6℃; Boiling point145.7℃; Solubility: insoluble in water, miscible in ethanol and ether; Density: relative density (water =1) 0.89; Relative density (air =1) 4.42; Stability: stability; Danger sign 7 (flammable liquid); Main uses: used as intermediates, adhesives and emulsifiers in organic synthesis.
2. Impact on the environment
1. Invasive routes of health hazards: inhalation, ingestion and percutaneous absorption. Health hazards: Inhalation, oral administration or skin absorption are harmful to the body. Its steam or fog will irritate eyes, mucous membranes and respiratory tract. Symptoms of poisoning include burning sensation, cough, wheezing, laryngitis, shortness of breath, headache, nausea and vomiting. 2. Toxicological data and environmental behavior toxicity: low toxicity. Acute toxicity: LD50900mg/kg (taken orally by rats); 2000mg/kg (rabbit skin); LC50 14305mg/m3, 4 hours (inhaled by rats) Irritation: rabbit percutaneous open stimulation test: 10mg(24 hours), mild irritation. Rabbit eye: 50mg, mild irritation. Reproductive toxicity: the lowest toxic concentration of inhalation in rats (TCL 0): 135 ppm (6 hours) (6 ~ 15 days of pregnancy), and the mortality rate increased after implantation. Carcinogenicity: IARC Carcinogenicity Comments: Animals are suspicious positive, and humans have no reliable data. Hazard characteristics: flammable, in case of open flame, high heat or contact with oxidant, there is a danger of combustion and explosion. It is easy to self-polymerize, and the polymerization reaction increases rapidly with the increase of temperature. In case of high heat, polymerization reaction may occur, and a large number of exothermic phenomena may occur, resulting in container rupture and explosion accidents. Combustion (decomposition) products: carbon monoxide and carbon dioxide.
3 laboratory monitoring methods
Identification of Trace Butyl Acrylate and Butyl Methacrylate in Air by Gas Chromatography (WS/T161-1999, Workplace Air) [published by Russia]/Ozhandzhapanyan A.N.Uzyan E.A.//гии.
4. Environmental standards
The maximum allowable concentration of harmful substances in the air of workshops in the former Soviet Union is 10mg/m3. The maximum allowable concentration of harmful substances in water in the former Soviet Union (1975) is 0.01mg/l/The sewage discharge standard in the former Soviet Union (1975) is 60 mg/l..
5. Emergency treatment and disposal methods
First, the emergency treatment of leakage will quickly evacuate the personnel in the leaked contaminated area to a safe area, isolate them, and strictly limit access. Cut off the fire. It is recommended that emergency personnel wear self-contained positive pressure breathing apparatus and fire protection clothing. Cut off the leakage source as much as possible. Prevent access to confined spaces such as sewers and flood discharge ditches. Small amount of leakage: mixed with sand, dry lime or soda ash. You can also brush the emulsion made of incombustible dispersant, and dilute the emulsion and put it into the wastewater system. A large number of leaks: damming or digging holes to contain them. Cover with foam to reduce steam disaster. Use explosion-proof pump to transfer it to tank car or special collector, and recycle it or transport it to waste disposal site for treatment. Second, protective measures respiratory system protection: when the concentration in the air exceeds the standard, you should wear a direct gas mask (half mask). When necessary, wear a catheter gas mask or a self-contained respirator. Eye protection: Wear chemical safety glasses. Physical protection: wear anti-static work clothes. Hand protection: wear benzene-proof and oil-proof gloves. Others: Smoking is strictly prohibited in the workplace. After work, take a shower and change clothes. Pay attention to personal hygiene. Third, first aid measures skin contact: take off contaminated clothes and rinse the skin thoroughly with soapy water and clear water. Eye contact: Lift eyelids and rinse with running water or normal saline. See a doctor. Inhalation: leave the scene quickly and go to a place with fresh air. Keep the respiratory tract unobstructed. If you have difficulty breathing, give oxygen. If breathing stops, give artificial respiration immediately. See a doctor. Ingestion: Drink plenty of warm water, induce vomiting and seek medical advice. Fire extinguishing method: fire extinguishing agent: foam, dry powder, carbon dioxide, sand. It is ineffective to put out the fire with water, but water can be used to keep the container cool in the fire. Firefighters must wear full-body fire-proof and gas-proof clothing. [6] [6] BA control system (building automation control network) is a data communication protocol specially designed for building automation control network. 1987, ASHARE's standards committee mobilized more than 20 world-renowned industry experts. After eight and a half years,1June 1995, ASHARE officially passed the world's first communication standard for building automation industry-BACNET. The standard number is ANSI/Ashare Standard135-1995, which became the national standard of the United States in February of the same year, and was also recognized by the European Commission as the draft European Union standard. After discussion and voting by the International Organization for Standardization (ISO), the BACnet standard was officially published as an international standard-ISO16484-5 on June 65438+1October 08, 2003, which is the only ISO standard in the field of building automation at present. BACnet solves multi-vendor systems (such as Honeywell, Airtek, Siemen, Johnson, Alerton, etc.). ) and equipment are incompatible, so it is difficult to integrate, and provides a method to realize the interoperability of different building automation systems, which is expected to become the TCP/IP protocol in the control network. BACnet has the following characteristics:? Openness: it is the current national standard and ISO international standard in the United States. ? Object-oriented: BACnet protocol adopts object-oriented technology, so it is extensible and reusable. ? Interoperability: ASHRAE BAC net Committee put forward a new method to describe the function of automatic control system, which is called "Interoperability Area", and specified five interoperability areas, namely, data sharing, alarm and event management, timing arrangement, trend recording, equipment and network management. Physical layer medium of BA control system: 1. RS232 protocol is adopted, and the cables used are ordinary shielded cables. 2. Using RS485 protocol, the cable used is twisted-pair shielded cable, and the characteristic impedance is120Ω. 3. The IEEE802.2 protocol is adopted, and the super five-class twisted pair (compatible with RJ45) and ARCNET twisted pair (compatible with RJ 1 1) are selected. 4. LonTalk protocol is adopted, and the transmission medium is twisted pair, power line and optical fiber. -.The general recommendation is as follows: ordinary twisted-pair shielded cable STP- 120ω (for RS485 &；; CAN) A pair of 20 AWG with an outer diameter of about 7.7 mm, suitable for indoor, pipeline and general industrial environment. When in use, one end of the shielding layer is grounded! Ordinary twisted pair shielded cable STP-120Ω (used for RS485 &；; CAN) a pair of 18 AWG, with an outer diameter of about 8.2mm It is suitable for indoor, pipeline and general industrial environment. When in use, one end of the shielding layer is grounded! Armored twisted-pair shielded cable astp-120Ω (forrs485 &; CAN) A pair of 18 AWG, with an outer diameter of about 12.3mm, can be used in places with serious interference, frequent rodent damage and lightning protection and explosion protection requirements. When in use, it is recommended that both ends of the armor layer are grounded, and one end of the innermost shielding layer is grounded!