Monofluorodichloroethane (HCFC-141b)

Monofluorodichloroethane (HCFC-141b) is an organic compound with the structural formula CCl2FCH3. It is a colorless, transparent and volatile liquid with a pungent aromatic odor. The critical temperature is 208.1°C, the critical pressure is 4.34 MPa, and the ODP value is 0.07~0.1. Stable performance, does not corrode metal. Soluble in ethanol, ether, etc. Vapor and air form an explosive mixture with an explosion limit of 5.6%~17.0% (volume). Mainly used as solvent and refrigerant[1]. Widely used in cleaning and solvent fields. Because its damage to the ozone layer is 1/10 of CFC-113, it is designated as an ideal substitute for fully halogenated chlorofluorocarbons.
Chinese name: Monofluorodichloroethane [2] Foreign name HCFC-141b Chemical formula CCl2FCH3 Molecular weight 116.950 [2] CAS registration number 1717-00-6 [2] Melting point -103.5 ℃ [1] Boiling point 32.1 ℃ [1] Density 1.325 g /cm³ [1] Appearance is colorless, transparent and volatile liquid with pungent aromatic odor. Mainly used as solvent and refrigerant. Catalog 1 Basic overview 2
Physical
properties
3
Scope of use
4 Product characteristics
5 Cleaning procedures
6 Compatibility
7 Stability
8 Impurities Concentration Control
9 Safety
10 Description
Basic Summary Editor’s Report
According to the Montreal Protocol: the use period of HCFC141b in developed countries is until 2010, and the United States, Japan and other countries have already restricted its use in advance. In developing countries such as China, the use period can be extended to 2040, and China has promised to advance it to 2030.
Its azeotrope with methanol, 141b MA, was developed mainly for the electronics industry. This feature is also suitable for cleaning and degreasing various metal and plastic precision parts and optical parts. It is designed to improve the cleaning power of polar pollutants and improve the volatilization characteristics of HCFC141b solution.
The physical properties of HCFC141b reported by the editor
are detailed in the following table:
Cleaning agent type
Physical parameters ODS type Transitional replacement ODS type Replacement ODS type
CFC113 HCFC225 HCFC141b HFC365mfc
Boiling point (℃) 47.7 54 32 40.2
Density (kg/m3) 1. 58 1.55 1.249 1.263
Heat of vaporization (kj/kg.k) 147 ----- 235 177
Viscosity (mPa.s) 25℃ 0.65 0.59 0.43 0.40
Steam pressure 0℃ (x 105Pa) ----- -- --- 0.28 0.19
Steam pressure 20℃ (x 105Pa) 0.36 ----- 0.65 0.47
Steam pressure 50℃ (x 105Pa) 1.09 ----- 1.84 1.42 Water
solubility 20 ℃ (﹪) 0.009 0.031 0.032 0.09
Water solubility at 20℃ (﹪) 0.02 0.033 0.27 0.50
Surface tension at 20℃ (mN/m) 18.7 16.2 18.7 15
KB value 27 31 56 13
Specific heat (cal/g.℃) 0.23 0.24 0.28 0.35
ODP (ozone depletion coefficient) 1 0.03 0.11 0
GWP (greenhouse effect coefficient) 5000 370 630 890
Maximum volume content of exposure (ppm) 1000 100 500 1000
Flash point (℃) Nothing nothing nothing-27
Dielectric constant (25℃) ----- ----- 7.9 12.3
Refractive index (20℃) ----- ----- 1.369 1.280
Scope of use Editing and broadcasting
aerospace technology, semiconductor packaging, electronics industry, Optical components, precision hardware, medical equipment, carrier media, and other applications such as SMT, LCD, audio heads, magnetic materials, resin components, etc.
Product characteristics editor reports
solubility: high KB value, selective solubility.
Reliability: High adaptability to various materials and can be used for various purposes.
Quick drying: excellent drying, not prone to spots, etc., maintaining good processing quality.
Energy saving: lower boiling point, lower heat of vaporization.
Safety: No flash point, non-flammable liquid. Device setup is easier.
Regenerability: The amount of industrial waste is significantly reduced through distillation regeneration within the device.
Environmental protection: ODP is 10% of CFC113, GWP is 12.6% of CFC113.
Permeability: low surface tension, and high fluidity.
The cleaning program editor
recommends the use of ultrasonic cleaning equipment to improve cleaning efficiency, economic benefits and evaporation control.
The cleaning procedure of HCFC141b is similar to that of TCE and CFC113.
The procedure includes immersing the items to be cleaned in boiling solvent, rinsing or spraying with cold solvent, and drying in solvent vapor to complete cleaning.
Material Compatibility:
The weight change percentage of thermoplastic and rubber materials after soaking in HCFC 141b solution for 7 days is as follows:
Thermoplastic CFC113 HCFC141b HFC365mfc
Compatibility Editor Report
ABS + - *
PVC + 0.77 -0.02
PE-HD + 7.1 0.37
PMMA + - 57
PC + 2.3 0.27
PP + 12.5 0.16
Nylon66 + 1.87 -0.33
PS * - 0.19
Rubber Natural Rubber - 185 7.2
Neoprene - 87 1.0
Viton Vition A * 46 90
EPDM * 44 1.6
silicone rubber - 110 16.1
nitrile rubber + 47 2.5
PFTE + + +
Remarks: + means compatible; - means incompatible; * means to be determined by actual testing.
It has no effect on general metal materials.
It is recommended that users conduct compatibility testing and overall evaluation before applying it to production.
Stability edit broadcast
HCFC141b has no flash point, is a non-flammable liquid.
Has excellent thermal stability and chemical stability.
But it cannot be in contact with strong basic compounds and basic metals.
Note that it may react harmfully with alkali metals and their alloys in the presence of air under high temperature and high pressure.
Impurity Concentration Control Editor's Report
In order to maintain the cleaning effectiveness of the solution, it is very important to keep the impurities in the cleaning tank at a low concentration, such as 20%. This concentration depends on the degree of cleaning required. Impurities can be monitored by measuring the specific gravity and boiling point of the solvent. When using HCFC 141b or 141b MA for the first time, it is recommended to monitor the wash tank weekly to ensure impurities are under control. However, due to the different usage conditions of different customers, the monitoring frequency can be shortened or extended according to their own needs.
As in any solvent system, impurities can accumulate. Therefore, the pH value can also be used to reflect the contamination of the cleaning system.
The safety editor reports that
it has no flash point and is a non-flammable liquid.
A combustion range exists in dry air up to the concentration range shown in the table below. Ignition under normal pressure requires 20J of energy.
Properties HFC-365mfc HCFC-141b Carbohydrate
flash point (℃) -27 None <-30
Lower limit of explosion in air (Vol%) 3.6 5.6 1-2
Upper limit of explosion in air (Vol%) 13.3 17.7 7-8
Minimum energy required to ignite fire (mJ) 10.8 20000 0.2
Passed the European PAFT (Fluorocarbon Alternatives Toxicity Test Project) test. All data show that HCFC 141b can be safely used in industry under normal hygienic conditions and when safe handling practices are followed.
According to hazardous substances regulations, HCFC 141b is not classified as a toxic substance. Jinhong recommends a maximum volume exposure of 500 ppm (8 hours/day, 40 hours/week).
If you have questions about other safety regulations, please refer to the MSDS.
Description The editor broadcasts
the product name
HCFC-141b
Molecular formula: CCl2F-CH3
Molecular weight: 116.9
Components
Main substances: 1,1-dichloro-1-fluoroethane
Concentration: ≥99.5%
CAS number: 1717-00-6
EINCS number: 404-080-1
Phrases R:59
Safety
- no serious harm to personal safety
-Once degraded, toxic substances will be released.
The on-site first aid method
will affect
inhalation . -High concentration,
there is a feeling of drunkenness, excitement, dizziness, and coma. -High concentration, there is a risk of arrhythmia . Moderate irritation on skin contact - assuming repeated exposure: risk of prolonged dermatitis on dry cracked skin. Ingestion - No human description available Prompt treatment Inhalation - Remove item from contaminated area - Administer oxygen and pacing if necessary - Seek medical attention if breathing or unusual symptoms Contact Eyes - Open eyelids and rinse with water for several minutes - If pain persists, seek medical advice from an ophthalmologist Seek medical attention if still conscious - rinse mouth with water - avoid causing vomiting Basic medical advice - do not use adrenaline-like drugs for inhalation - no contact with eyes - no contact with skin - no swallowing - lavage stomach with activated charcoal slurry if necessary



































Firefighting Matters
General fire-fighting methods
- Once the fire source is approached, all fire-fighting methods are suitable for
special fire-fighting methods
- Without limiting
hazard statements
- Hazardous gases/vapors may be generated if decomposed (see Section 10)
- High energy sources capable of producing open flames
- Under very specific conditions (see Section 9 or consult the manufacturer) gases/vapors may be flammable.
Protective measures when handlers are present
- Evacuate all unnecessary personnel
- Leave only those who are trained or familiar with the hazards of the article
- Wear personal breathing equipment when approaching or in the danger zone
- Handlers are in close proximity Wear acid-proof clothing when handling
- After handling, clean equipment and equipment (carefully remove clothing, bathe and clean)
Other measures
- If safety conditions permit, remove leaking containers, or cool with plenty of water
- After the fire, in Ventilate and clean the room before entering Measures
for Accidental Leakage Protection - Refer to Section 5 for protection - Refer to Section 8 for protection - If safety permits, try to stop the spill while ensuring the safety of personnel - Eliminate all avoid flames or sparks - avoid contact with materials and products that react with this substance (see Section 10) - use sponge to absorb spilled liquid to slow evaporation - keep the site ventilated Cleaning method - if feasible, use sand Contain large amounts of spilled liquid - use appropriate methods to collect the spilled liquid - and place it in a closed container and mark it well












- Clean the site with plenty of water
- Prevent the item from flowing into sewers or other restricted areas
Measures to protect the environment
- Avoid flowing into the environment (sewers, rivers, soil...)
Operation and storage
operations
- Carry out in closed pipelines and equipment Industrial operation
- operate in a well-ventilated area
- avoid decomposition of product vapor by any heat source
- avoid decomposition of product vapor by welding arc
- should be transported and stored by pump or its own gravity
-
in a ventilated, shaded area
- avoid direct sunlight
- Keep away from sources of fire and heat
- Keep away from reactive products (see Section 10)
Other precautions
- No flames, sparks, no smoking
- Use floor installations
- Beware of electrostatic discharge - Warn relevant personnel about the hazardous packaging
of the product - No packaging materials required Anti-corrosion coating - Control of exposure to metal materials /Personnel protection Engineering controls - Site ventilation - Provide on-site ventilation to eliminate volatilization hazards - Follow protective measures in Section 7 Respiratory protection - Not required if site ventilation is adequate - Only use in accordance with international standards / National standard respiratory protective equipment - if there is a risk of decomposition, complete respiratory equipment must be worn - complete respiratory equipment must be worn when oxygen is insufficient or medium is limited, or a large amount of product evaporates out of control, and masks and protective clothing cannot provide sufficient protection. Hand protection














- chemical resistant protective gloves
- recommended material: polyvinyl alcohol
eye protection
- goggles for industrial handling
- wear face shield with goggles if there is a risk of splashing
else skin protection
- wear if there is a risk of splashing Work clothes and neoprene work shoes
Other measures
- set bathing and eyewash points Physical and
chemical properties
State: liquid
Appearance: colorless
Odor: slight ether
phase change Freezing point : -103.5
℃ Ratio: 5.6% v/v air Maximum air ratio: 17.7% v/v air Remarks: Liquid is not easy to ignite (minimum ignition energy is about 20 joules at 20°C) Spontaneous combustion = 532°C Vapor pressure at 20°C is 648 mbar at 50°C It is 1840 mbar Density specific gravity (D 25/4): 1.23 Vapor density (air=1) 4.86 at 25°C Soluble water: 4g/kg at 20°C can be dissolved in most organic solvents pH value Neutral viscosity at 25°C The decomposition temperature below is 0.42mPa·s
























>200°C
stability and reactivity
stability
- Stable under specific conditions
- After contact with flame or hot metal surface, it will decompose to produce dangerous gases. Materials
to avoid
- Heat and heat sources
to avoid
- Alkaline materials and their alloys
- Strong base desiccants
- Ferric chloride
- Some molecular sieves
- Alkaline rock metals
- Metal powders
Hazardous decomposition products
- Hydrogen
chloride -
Hydrochloric acid - Phosgene
- Fluorophosphates
Additional information
- Contact with reactive substrates or alkaline materials may cause violent reactions Or explosion
- gas is heavier than air, highly
toxic when dispersed on a horizontal
plane
- esophageal system LD 50, rat > 5000 mg/kg
- skin contact LD 50, rat > 2000 mg/kg
- respiratory system LC 50, 4 hours, rat 301 mg /l
irritation
- no irritation to rabbit skin
- slight irritation to rabbit eyes
- no irritation to mouse respiratory tract - no irritation to guinea
pig
skin
chronic toxicity
- no mutagenicity, cariogenicity, teratogenicity
- dog respiratory system only Exposed to >=1%, the heart reacts after being stimulated by adrenaline
- After prolonged exposure to the respiratory system of mice: test/central nervous system cariogenicity >= 0.5% v/v air, toxic effect. Testicular Cells/Benign Tumors
Summary
- No detectable toxic effects
Ecological
Violence Ecologicality
- Fish, LC50, 96 hours, 126 mg/l
- Crustaceans, Daphnia, EC 50, 48 hours, 31 mg/l
- Algae, EC 50, 72 hours, > 44 mg/l
Chronic ecological properties
- no data
Mobility
- air, Henry's constant (H) +/- 2815 Pa.m/mol
Conclusion: Volatility Maximum
conditions: 20°C/calculated value
- water, Volatility: time 1/2 = 3.2 hours
Conditions: 20°C/calculated
- soil/sediment, absorption pH between 1.54-1.89
Conditions: calculated
Abiotic degradation
- air, indirect photooxidation: time 1/2 = 7.9 Hourly
conditions: Photosensitizer: OH group
Degradation products: carbon dioxide/hydrochloric acid/hydrogen chloride
- air, photodecomposition, ODP=0.11
Conclusion: limited effect in the isothermal ozone region
Reference value for CFC 11: ODP=1
- air, greenhouse effect GWP =0.12
Reference value for CFC 11
- Water/Soil
Conclusion: Small amount of hydrolytic and photolytic
biodegradation
- Oxidation test: Easily biodegradable in closed bottles, degradability ranges from 3-10% within 28 days,
Conclusion: Not easily biodegradable
- Oxidation test: Biodegradability of methane oxidation, degradation value is 100% in 20 hours
Conclusion: Rapid and massive biodegradation
Potential bioaccumulation
- Bioconcentration: Log Po/w=2.3
Conclusion: Potential Bioaccumulation is very weak
Summary
- The product exists stably in the air for a long time (survival time in the air: 11.4 years)
- Harmful to organisms in the water
- Due to the nature of the product, it is harmful to the water environment
- High volatility
- In Biodegradability in a suitable oxidizing environment
- Low bioaccumulation potential
Waste Requirements
Waste Disposal
- Comply with local/government and national regulations
- Contact manufacturer for recycling
or
- Send product to an authorized industrial waste incinerator
- Incinerator required Systems equipped with neutralized HF
Packaging handling
- to avoid special handling, try to use the special container
regulation
EEC label
- according to Dir. 93/21/EEC - section 5.2.2.2R