ISOPA PRODUCT STEWARDSHIP PROGRAMMES. Walk the Talk. Methylene Chloride

Transcription

1 ISOPA PRODUCT STEWARDSHIP PROGRAMMES Walk the Talk Methylene Chloride Revision

2 Methylene Chloride label information CLP DSD Signal word: Warning Hazard statements H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation H336 May cause drowsiness or dizziness H351 Suspected of causing cancer H373 May cause damage to liver/ blood through prolonged or repeated exposure Precautionary Statements Follow precaution statements and product labelling in supplier s (e)sds. Signal word: Harmful Risk Phrases R40 Limited evidence of a carcinogenic effect R36/37/38 Irritating to eyes, respiratory system and skin R67 Vapours may cause drowsiness and dizziness Safety Phrases Follow precaution statements and product labelling in supplier s (e)sds.

3 Methylene Chloride: Hazardous Properties MAIN PRACTICAL CONCERNS: High concentrations of vapours will cause loss of feeling (anesthesia) and unconsciousness (narcosia) Skin irritation by direct contact OTHER WARNING PROPERTIES: -> Sweet, ether-like odour at rather high level : inadequate warning for hazardous exposures. ->Gas density >>>air :vapours tend to remain localized and/or diffuse slowly in the breathing zone of workers. ->Flammable range: 14% to 22% (in air) : relatively low hazard. 3

4 Protective Measures Exposure to high levels of methylene chloride is likely if methylene chloride, or a product containing it, is used in a room with inadequate ventilation. When heated to decomposition, even with a lit cigarette, methylene chloride is likely to generate phosgene and carbonyl fluoride... SO Use PPE when working Check that the extraction system is switched on Do not eat, drink or smoke in the workplace If you feel unwell, inform your colleagues and leave the workshop. Where could you be exposed? 4

5 Where could you be exposed? Foaming area Sawing area Foam curing area Cleaning operations using methylene chloride as solvent Spillages 5

6 ISOPA PRODUCT STEWARDSHIP PROGRAMMES Walk the Talk Pentane 6

7 CLP Signal word: Danger Pentane label information Hazard statements: H224 Extremely flammable liquid and vapor H304 May be fatal if swallowed and enters airways. H336 May cause drowsiness or dizziness. H411 Toxic to aquatic life with long lasting effects EUH066 Repeated exposure may cause skin dryness or cracking Precautionary Statements Follow precautionary statements and product labelling in supplier s (e)sds DSD Signal word: Harmful Risk Phrases: R12 Extremely flammable R65 Harmful: may cause lung damage if swallowed R66 Repeated exposure may cause skin dryness or cracking R67 Vapors may cause drowsiness and dizziness R51/53 Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment Safety Phrases Follow safety phrases and product labelling in supplier s (e)sds. Additional Hazard information related to cyclo pentane and mixtures see supplier s (e)sds. 7

8 Hazardous Properties of Pentane Flash Point: -40 C to - 20 C (the lowest temperature at which liquid releases sufficient vapour for ignition) Auto ignition temperature ca. 280 C (where the vapour-air mixture ignites on a hot surface.) Explosive vapour-air mixtures: Lower explosion limit: 1,4 Vol% = 41 g/m³ Upper explosion limit 7,8 Vol% = 240 g/m³ (Evaporation rate at 20 C - 30 C > 2,4 kg/h per m² surface) Vapour has higher density than air! Easy build-up of electric charge. Highly flammable. 8

9 Protective Measures Avoid explosive atmosphere (primary measure) No open handling, closed systems. Controlled ventilation. Generate inert atmosphere with Nitrogen. Avoid sources of ignition (secondary measures) Explosion protected machinery (encapsulation, no sparks, no hot surfaces) Avoid electrostatic sparks (earth machinary, no plastic containers) 9

10 Incident / Alarm In case of spillage or alarm from monitors Keep calm Stop pentane dosage, avoid ignition sources Increase ventilation Stop leakage Cover spillage with absorbant Self-contained breathing apparatus if ventilation is insufficient Protective clothing Extinguishing material: CO 2, Foam, Powder; no water! 10

11 Use of Pentane Pentane is highly flammable and may build up explosive mixtures with air Avoid any ignition source Ensure that static electricity cannot build-up Monitor level of pentane in air; remember that pentane is heavier than air 11

12 ISOPA PRODUCT STEWARDSHIP PROGRAMMES Walk the Talk Catalysts 12

13 Catalysts Catalysts can be corrosive, irritants, sensitisers and flammable Symptoms of exposure include chemical burn, swelling, itching, redness and hazy vision Use PPE when working with catalysts and polyol formulation components 13

14 ISOPA PRODUCT STEWARDSHIP PROGRAMMES Walk the Talk Methyl Isocyanates 14

15 Monoisocyanates and Diisocyanates Monoisocyanates are used for various applications but not for polyurethanes For example, methyl isocyanate is used for pesticides and insecticides All polyurethanes are made with diisocyanates such as MDI or TDI 15

16 Monoisocyanates and Diisocyanates Monoisocyanates are used for various applications but not for polyurethanes For example, methyl Methyl-isocyanate isocyanate is used for pesticides and insecticides is not used in making polyurethanes All polyurethanes are made with diisocyanates such as MDI or TDI 16

17 Disclaimer While ISOPA and its members make every effort to present accurate and reliable information in utmost good faith on the basis of the best information currently available, it is to be relied upon at the user s own risk. No representations or warranties are made with regard to its completeness, accuracy or reliability and no liability will be accepted by ISOPA nor any company participating in ISOPA for damages of any nature whatsoever resulting from the use of or reliance on the information. 17

18 ISOPA PRODUCT STEWARDSHIP PROGRAMMES Walk the Talk Methylene Chloride Revision ISOPA PRODUCT STEWARDSHIP PROGRAMMES WALK THE TALK SPEAKER NOTES SUPPLEMENTARY MODULE Explain that the purpose of these short modules is to discuss the EHS issues and safe handling of other chemicals used in the factory. We do not offer full training in the handling and use of these chemicals. If not already done before the presentation/dialogue starts introduce yourself and explain that you have been trained to run the session. Then ask everyone present to simply introduce themselves name and what they do in the factory. A reminder - we will learn more if we have a dialogue, that is, the presenter does not do all the speaking. We all learn by sharing experiences. Note the disclaimer on the last slide PART 1 Methylene chloride MethyleneChloride is a useful blowing agent for flexible foam and has the benefits of low ozone depletion potential (ODP is 0.02 ; 141B is 0.11 ; R11 is 1) and a very low greenhouse warming potential (GWP is 9 ; CO2 is 1; 141B is 630 ; R11 is 4000!) IT is a colourless, volatile liquid with a mild ether-like odour ; it is flammable only at very high concentration in air. However methylene chloride even not classified as toxic must be used with care and under appropriate conditions ( see later in the presentation) 1

19 Methylene Chloride label information CLP DSD Signal word: Warning Hazard statements H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation H336 May cause drowsiness or dizziness H351 Suspected of causing cancer H373 May cause damage to liver/ blood through prolonged or repeated exposure Precautionary Statements Follow precaution statements and product labelling in supplier s (e)sds. Signal word: Harmful Risk Phrases R40 Limited evidence of a carcinogenic effect R36/37/38 Irritating to eyes, respiratory system and skin R67 Vapours may cause drowsiness and dizziness Safety Phrases Follow precaution statements and product labelling in supplier s (e)sds. The purpose here is to indicate classification of Methylenechloride in order to be well aware, but not to scare people. It may be carcinogenic, as it has been linked to cancer of the lungs, liver, and pancreas in laboratory animals. 2

20 Methylene Chloride: Hazardous Properties MAIN PRACTICAL CONCERNS: High concentrations of vapours will cause loss of feeling (anesthesia) and unconsciousness (narcosia) Skin irritation by direct contact OTHER WARNING PROPERTIES: -> Sweet, ether-like odour at rather high level : inadequate warning for hazardous exposures. ->Gas density >>>air :vapours tend to remain localized and/or diffuse slowly in the breathing zone of workers. ->Flammable range: 14% to 22% (in air) : relatively low hazard. 3 Dichloromethane is the least toxic of the simple chlorohydrocarbons, but it is not without its health risks as its high volatility makes it an acute inhalation hazard. Dichloromethane is also metabolized by the body to carbon monoxide potentially. A person breathing smaller amounts of methylene chloride may become less attentive and less accurate in tasks requiring hand-eye coordination ( potential source of accident). Prolonged skin contact can result in the dichloromethane dissolving some of the fatty tissues in skin, resulting in skin irritation or chemical burns. Odor is not an adequate warning property for methylene chloride, the odor threshold is 250 ppm, which is 10 times higher than the OSHA PEL (25 ppm). 3

21 Protective Measures Exposure to high levels of methylene chloride is likely if methylene chloride, or a product containing it, is used in a room with inadequate ventilation. When heated to decomposition, even with a lit cigarette, methylene chloride is likely to generate phosgene and carbonyl fluoride... SO Use PPE when working Check that the extraction system is switched on Do not eat, drink or smoke in the workplace If you feel unwell, inform your colleagues and leave the workshop. Where could you be exposed? 4 Key measures for safe handling are to avoid excessive contact and prevent any degradation of methylene chloride. Refer to the the safe handling of iocyanates (TDI). 4

22 Where could you be exposed? Foaming area Sawing area Foam curing area Cleaning operations using methylene chloride as solvent Spillages 5 Exposure is likely if and when methylene chloride is used as solvent ( cleaning operation ) or as blowing agent for flexible foam in the workshop. If the foam contains several % of methylene chloride, the TLV can be reached without odor detection in the storage room as for TDI. 5

23 ISOPA PRODUCT STEWARDSHIP PROGRAMMES Walk the Talk Pentane 6 PART 2 Pentane Pentane is a very useful blowing agent and has the benefits of no ozone depletion potential (zero ODP) and a very low greenhouse warming potential (low GWP) However, it is highly flammable 6

24 CLP Signal word: Danger Pentane label information Hazard statements: H224 Extremely flammable liquid and vapor H304 May be fatal if swallowed and enters airways. H336 May cause drowsiness or dizziness. H411 Toxic to aquatic life with long lasting effects EUH066 Repeated exposure may cause skin dryness or cracking Precautionary Statements Follow precautionary statements and product labelling in supplier s (e)sds DSD Signal word: Harmful Risk Phrases: R12 Extremely flammable R65 Harmful: may cause lung damage if swallowed R66 Repeated exposure may cause skin dryness or cracking R67 Vapors may cause drowsiness and dizziness R51/53 Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment Safety Phrases Follow safety phrases and product labelling in supplier s (e)sds. Additional Hazard information related to cyclo pentane and mixtures see supplier s (e)sds. 7

25 Hazardous Properties of Pentane Flash Point: -40 C to - 20 C (the lowest temperature at which liquid releases sufficient vapour for ignition) Auto ignition temperature ca. 280 C (where the vapour-air mixture ignites on a hot surface.) Explosive vapour-air mixtures: Lower explosion limit: 1,4 Vol% = 41 g/m³ Upper explosion limit 7,8 Vol% = 240 g/m³ (Evaporation rate at 20 C - 30 C > 2,4 kg/h per m² surface) Vapour has higher density than air! Easy build-up of electric charge. Highly flammable. 8 Pentane is highly flammable because: It has a low flash point and When mixed with air it readily forms explosive mixtures 8

26 Protective Measures Avoid explosive atmosphere (primary measure) No open handling, closed systems. Controlled ventilation. Generate inert atmosphere with Nitrogen. Avoid sources of ignition (secondary measures) Explosion protected machinery (encapsulation, no sparks, no hot surfaces) Avoid electrostatic sparks (earth machinary, no plastic containers) 9 Key measures for safe handling are to avoid explosive mixtures with air AND ignition sources 9

27 Incident / Alarm In case of spillage or alarm from monitors Keep calm Stop pentane dosage, avoid ignition sources Increase ventilation Stop leakage Cover spillage with absorbant Self-contained breathing apparatus if ventilation is insufficient Protective clothing Extinguishing material: CO 2, Foam, Powder; no water! 10 If safe levels of pentane are exceeded or there is a spillage stay calm and follow the steps shown Several of the steps are similar to those if there is an MDI spillage but pentane has a much higher flammability DO NOT USE WATER as a fire extinguishing material 10

28 Use of Pentane Pentane is highly flammable and may build up explosive mixtures with air Avoid any ignition source Ensure that static electricity cannot build-up Monitor level of pentane in air; remember that pentane is heavier than air 11 A summary of precautions to follow when using pentane Safe use of pentane depends on having the correct engineering facilities in place AND using them correctly It s also important to know how much pentane is present in the atmosphere 11

29 ISOPA PRODUCT STEWARDSHIP PROGRAMMES Walk the Talk Catalysts 12 PART 3 Catalysts Catalysts are used in the polyol formulations to control the speed of the polyurethane reaction As with any other chemicals, there are precautions to be followed so that they can be used safely 12

30 Catalysts Catalysts can be corrosive, irritants, sensitisers and flammable Symptoms of exposure include chemical burn, swelling, itching, redness and hazy vision Use PPE when working with catalysts and polyol formulation components 13 There are several types of catalysts and you should always take precautions, particularly when preparing formulations Always use the appropriate PPE when working with catalysts 13

31 ISOPA PRODUCT STEWARDSHIP PROGRAMMES Walk the Talk Methyl Isocyanates 14 PART 4 Methyl Isocyanates (Use MDI or TDI comparisons as appropriate) We are frequently asked about methyl isocyanate (MIC) and whether it is the same as MDI or TDI 14

32 Monoisocyanates and Diisocyanates Monoisocyanates are used for various applications but not for polyurethanes For example, methyl isocyanate is used for pesticides and insecticides All polyurethanes are made with diisocyanates such as MDI or TDI 15 15

33 Monoisocyanates and Diisocyanates Monoisocyanates are used for various applications but not for polyurethanes For example, methyl Methyl-isocyanate isocyanate is used for pesticides and insecticides is not used in making polyurethanes All polyurethanes are made with diisocyanates such as MDI or TDI 16 16

34 Disclaimer While ISOPA and its members make every effort to present accurate and reliable information in utmost good faith on the basis of the best information currently available, it is to be relied upon at the user s own risk. No representations or warranties are made with regard to its completeness, accuracy or reliability and no liability will be accepted by ISOPA nor any company participating in ISOPA for damages of any nature whatsoever resulting from the use of or reliance on the information