
Chemask® HV Solder Masking Agent (High Viscosity)
CHV1, CHV5, CHV8, CHV1C, CHV5C, CHV8C
Chemtronics
8125 Cobb Center Drive
Kennesaw, GA 30152
Tel. 770-424-4888 or toll free 800-645-5244
Chemtrec - 1-800-424-9300 or collect 703-527-3887
24/7
Chemtronics
8125 Cobb Center Drive
Kennesaw, GA 30152
Tel. 770-424-4888 or toll free 800-645-5244
Material Safety Data Sheet
1. Product and company identification
2. Hazards identification
Potential acute health effects
Exposure to decomposition products may cause a health hazard. Serious effects may
be delayed following exposure. Harmful by inhalation. At very high concentrations, can
displace the normal air and cause suffocation from lack of oxygen. MAY CAUSE
RESPIRATORY TRACT AND EYE IRRITATION.
Moderately irritating to eyes.
Harmful if swallowed. Irritating to mouth, throat and stomach. Irritating to mouth, throat
and stomach. Latex may solidify in intestinal tract.
Moderately irritating to the skin. May cause allergic skin reactions with repeated
exposure. MAY CAUSE ALLERGIC SKIN REACTION. MAY CAUSE ALLERGIC
RESPIRATORY REACTION.
Liquid. [Viscous liquid.]
MAY CAUSE EYE AND SKIN IRRITATION. CONTAINS MATERIAL THAT MAY
CAUSE TARGET ORGAN DAMAGE, BASED ON ANIMAL DATA. POSSIBLE
CANCER HAZARD - CONTAINS MATERIAL WHICH MAY CAUSE CANCER, BASED
ON ANIMAL DATA.
This material is considered hazardous by the OSHA Hazard Communication Standard
(29 CFR 1910.1200).
Potential chronic health effects
Do not handle until all safety precautions have been read and understood. Obtain
special instructions before use. Do not breathe vapor or mist. Do not eat, drink or
smoke when using this product. Avoid contact with eyes, skin and clothing. Use
personal protective equipment as required. Wash thoroughly after handling.

2. Hazards identification
See toxicological information (Section 11)
Medical conditions
aggravated by overexposure
Pre-existing disorders involving any target organs mentioned in this MSDS as being at
risk may be aggravated by over-exposure to this product.
Contains material which may cause cancer, based on animal data. Risk of cancer
depends on duration and level of exposure.
No known significant effects or critical hazards.
No known significant effects or critical hazards.
No known significant effects or critical hazards.
Contains material that may cause target organ damage, based on animal data.
No known significant effects or critical hazards.
Over-exposure signs/symptoms
Adverse symptoms may include the following:
stomach pains
Adverse symptoms may include the following:
irritation
redness
Adverse symptoms may include the following:
irritation
watering
redness
Adverse symptoms may include the following:
drowsiness/fatigue
headache
respiratory tract irritation
Contains material which may cause damage to the following organs: gastrointestinal
tract, upper respiratory tract, skin, central nervous system (CNS), eye, lens or cornea.
methanol
3. Composition/information on ingredients
There are no additional ingredients present which, within the current knowledge of the supplier and in the
concentrations applicable, are classified as hazardous to health or the environment and hence require reporting
in this section.
Wash out mouth with water. Do not induce vomiting unless directed to do so by medical
personnel. Never give anything by mouth to an unconscious person. Get medical
attention immediately.
Check for and remove any contact lenses. Immediately flush eyes with plenty of water
for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical
attention immediately.
In case of contact, immediately flush skin with plenty of water for at least 15 minutes
while removing contaminated clothing and shoes. Wash clothing before reuse. Clean
shoes thoroughly before reuse. Get medical attention immediately.
Move exposed person to fresh air. If not breathing, if breathing is irregular or if
respiratory arrest occurs, provide artificial respiration or oxygen by trained personnel.
Loosen tight clothing such as a collar, tie, belt or waistband. Get medical attention
immediately.

In case of inhalation of decomposition products in a fire, symptoms may be delayed.
The exposed person may need to be kept under medical surveillance for 48 hours.
Protection of first-aiders
No action shall be taken involving any personal risk or without suitable training. It may
be dangerous to the person providing aid to give mouth-to-mouth resuscitation.
Use an extinguishing agent suitable for the surrounding fire.
5. Fire-fighting measures
Promptly isolate the scene by removing all persons from the vicinity of the incident if
there is a fire. No action shall be taken involving any personal risk or without suitable
training.
In a fire or if heated, a pressure increase will occur and the container may burst.
Special protective
equipment for fire-fighters
Fire-fighters should wear appropriate protective equipment and self-contained breathing
apparatus (SCBA) with a full face-piece operated in positive pressure mode.
Hazardous thermal
decomposition products
Decomposition products may include the following materials:
carbon dioxide
carbon monoxide
nitrogen oxides
sulfur oxides
metal oxide/oxides
Flammability of the product
No action shall be taken involving any personal risk or without suitable training.
Evacuate surrounding areas. Keep unnecessary and unprotected personnel from
entering. Do not touch or walk through spilled material. Avoid breathing vapor or mist.
Provide adequate ventilation. Wear appropriate respirator when ventilation is
inadequate. Put on appropriate personal protective equipment (see Section 8).
Stop leak if without risk. Move containers from spill area. Approach release from
upwind. Prevent entry into sewers, water courses, basements or confined areas. Wash
spillages into an effluent treatment plant or proceed as follows. Contain and collect
spillage with non-combustible, absorbent material e.g. sand, earth, vermiculite or
diatomaceous earth and place in container for disposal according to local regulations
(see Section 13). Dispose of via a licensed waste disposal contractor. Contaminated
absorbent material may pose the same hazard as the spilled product. Note: see
Section 1 for emergency contact information and Section 13 for waste disposal.
Environmental precautions
6. Accidental release measures
Avoid dispersal of spilled material and runoff and contact with soil, waterways, drains
and sewers. Inform the relevant authorities if the product has caused environmental
pollution (sewers, waterways, soil or air).
Stop leak if without risk. Move containers from spill area. Dilute with water and mop up
if water-soluble. Alternatively, or if water-insoluble, absorb with an inert dry material and
place in an appropriate waste disposal container. Dispose of via a licensed waste
disposal contractor.
Put on appropriate personal protective equipment (see Section 8). Eating, drinking and
smoking should be prohibited in areas where this material is handled, stored and
processed. Workers should wash hands and face before eating, drinking and smoking.
Remove contaminated clothing and protective equipment before entering eating areas.
Do not get in eyes or on skin or clothing. Do not ingest. Avoid breathing vapor or mist.
If during normal use the material presents a respiratory hazard, use only with adequate
ventilation or wear appropriate respirator. Keep in the original container or an approved
alternative made from a compatible material, kept tightly closed when not in use. Empty

Store in accordance with local regulations. Store in original container protected from
direct sunlight in a dry, cool and well-ventilated area, away from incompatible materials
(see Section 10) and food and drink. Keep container tightly closed and sealed until
ready for use. Containers that have been opened must be carefully resealed and kept
upright to prevent leakage. Do not store in unlabeled containers. Use appropriate
containment to avoid environmental contamination.
containers retain product residue and can be hazardous. Do not reuse container.
ACGIH TLV (United States, 6/2013). Absorbed through skin.
STEL: 328 mg/m³ 15 minutes.
STEL: 250 ppm 15 minutes.
TWA: 262 mg/m³ 8 hours.
TWA: 200 ppm 8 hours.
NIOSH REL (United States, 4/2013). Absorbed through skin.
STEL: 325 mg/m³ 15 minutes.
STEL: 250 ppm 15 minutes.
TWA: 260 mg/m³ 10 hours.
TWA: 200 ppm 10 hours.
OSHA PEL (United States, 2/2013).
TWA: 260 mg/m³ 8 hours.
TWA: 200 ppm 8 hours.
OSHA PEL 1989 (United States, 3/1989). Absorbed through skin.
STEL: 325 mg/m³ 15 minutes.
STEL: 250 ppm 15 minutes.
TWA: 260 mg/m³ 8 hours.
TWA: 200 ppm 8 hours.
OSHA PEL (United States, 2/2013).
TWA: 15 mg/m³ 8 hours. Form: Total dust
OSHA PEL 1989 (United States, 3/1989).
TWA: 10 mg/m³ 8 hours. Form: Total dust
ACGIH TLV (United States, 6/2013).
TWA: 10 mg/m³ 8 hours.
8. Exposure controls/personal protection
Use a properly fitted, air-purifying or air-fed respirator complying with an approved
standard if a risk assessment indicates this is necessary. Respirator selection must be
based on known or anticipated exposure levels, the hazards of the product and the safe
working limits of the selected respirator.
If user operations generate dust, fumes, gas, vapor or mist, use process enclosures,
local exhaust ventilation or other engineering controls to keep worker exposure to
airborne contaminants below any recommended or statutory limits.
Wash hands, forearms and face thoroughly after handling chemical products, before
eating, smoking and using the lavatory and at the end of the working period.
Appropriate techniques should be used to remove potentially contaminated clothing.
Wash contaminated clothing before reusing. Ensure that eyewash stations and safety
showers are close to the workstation location.
Recommended monitoring
procedures
If this product contains ingredients with exposure limits, personal, workplace
atmosphere or biological monitoring may be required to determine the effectiveness of
the ventilation or other control measures and/or the necessity to use respiratory
protective equipment. Reference should be made to appropriate monitoring standards.
Reference to national guidance documents for methods for the determination of
hazardous substances will also be required.

8. Exposure controls/personal protection
Safety eyewear complying with an approved standard should be used when a risk
assessment indicates this is necessary to avoid exposure to liquid splashes, mists or
dusts. If contact is possible, the following protection should be worn, unless the
assessment indicates a higher degree of protection: chemical splash goggles.
Personal protective equipment for the body should be selected based on the task being
performed and the risks involved and should be approved by a specialist before
handling this product.
Chemical-resistant, impervious gloves complying with an approved standard should be
worn at all times when handling chemical products if a risk assessment indicates this is
necessary. Considering the parameters specified by the glove manufacturer, check
during use that the gloves are still retaining their protective properties. It should be
noted that the time to breakthrough for any glove material may be different for different
glove manufacturers. In the case of mixtures, consisting of several substances, the
protection time of the gloves cannot be accurately estimated.
Environmental exposure
controls
Emissions from ventilation or work process equipment should be checked to ensure
they comply with the requirements of environmental protection legislation. In some
cases, fume scrubbers, filters or engineering modifications to the process equipment
will be necessary to reduce emissions to acceptable levels.
Liquid. [Viscous liquid.]
101.3 kPa (760 mm Hg) [room temperature]
Boiling/condensation point
9. Physical and chemical properties
[Product does not sustain combustion.]
Reactive or incompatible with the following materials: alkalis Strong oxidizing materials
Under normal conditions of storage and use, hazardous decomposition products should
not be produced.
Avoid increased storage temperature.
10. Stability and reactivity
Hazardous decomposition
products
Possibility of hazardous
reactions
Under normal conditions of storage and use, hazardous reactions will not occur.
11. Toxicological information

11. Toxicological information
72 hours 300
Micrograms
Intermittent
12. Ecological information
No known significant effects or critical hazards.
Acute EC50 16.912 mg/l Marine water
Acute EC50 10000000 µg/l Fresh water
Acute LC50 2500000 µg/l Marine water
Crustaceans - Crangon crangon Adult
Acute LC50 100 mg/l Fresh water
Fish - Pimephales promelas Juvenile (Fledgling, Hatchling,
Weanling)
Chronic NOEC 9.96 mg/l Marine water
Acute EC50 5.83 mg/l Fresh water
Algae - Pseudokirchneriella
subcapitata - Exponential growth
phase
Acute LC50 3 mg/l Fresh water
Crustaceans - Ceriodaphnia
dubia - Neonate
Acute LC50 5.5 ppm Fresh water
Daphnia - Daphnia magna Juvenile (Fledgling, Hatchling,
Weanling)
Acute LC50 1000 mg/l Fresh water
Fish - Pimephales promelas
Chronic NOEC 0.984 mg/l Fresh water
Algae - Pseudokirchneriella
subcapitata - Exponential growth
phase
Persistence/degradability

12. Ecological information
The generation of waste should be avoided or minimized wherever possible. Disposal
of this product, solutions and any by-products should at all times comply with the
requirements of environmental protection and waste disposal legislation and any
regional local authority requirements. Dispose of surplus and non-recyclable products
via a licensed waste disposal contractor. Waste should not be disposed of untreated to
the sewer unless fully compliant with the requirements of all authorities with jurisdiction.
Waste packaging should be recycled. Incineration or landfill should only be considered
when recycling is not feasible. This material and its container must be disposed of in a
safe way. Care should be taken when handling emptied containers that have not been
cleaned or rinsed out. Empty containers or liners may retain some product residues.
Avoid dispersal of spilled material and runoff and contact with soil, waterways, drains
and sewers.
13. Disposal considerations
Disposal should be in accordance with applicable regional, national and local laws and regulations.
Refer to Section 7: HANDLING AND STORAGE and Section 8: EXPOSURE CONTROLS/PERSONAL PROTECTION
for additional handling information and protection of employees.
United States - RCRA Toxic hazardous waste "U" List
Methanol (I); Methyl alcohol (I)
14. Transport information
Irritating material
Carcinogen
Target organ effects
15. Regulatory information
Clean Water Act (CWA) 307
: zinc bis(dibutyldithiocarbamate)
Clean Water Act (CWA) 311
: ammonia
::TSCA 8(a) CDR Exempt/Partial exemption
United States inventory (TSCA 8b)
: Not determined.

15. Regulatory information
The following components are listed: METHANOL
WARNING:
This product contains a chemical known to the State of California to cause birth defects or other
reproductive harm.
SARA 313 notifications must not be detached from the MSDS and any copying and redistribution of the MSDS shall
include copying and redistribution of the notice attached to copies of the MSDS subsequently redistributed.
zinc bis(dibutyldithiocarbamate)
zinc bis(dibutyldithiocarbamate)
Form R - Reporting
requirements
Supplier notification
California Prop. 65
Clean Air Act Section 112
(b) Hazardous Air
Pollutants (HAPs)
Clean Air Act Section 602
Class I Substances
Clean Air Act Section 602
Class II Substances
DEA List I Chemicals
(Precursor Chemicals)
DEA List II Chemicals
(Essential Chemicals)
The following components are listed: Methanol
The following components are listed: ZINC compounds; METHYL ALCOHOL;
METHANOL; TITANIUM DIOXIDE; TITANIUM OXIDE (TiO2)
The following components are listed: ZINC COMPOUNDS; METHANOL; TITANIUM
OXIDE (TIO2)
Composition/information on ingredients
Immediate (acute) health hazard
Delayed (chronic) health hazard
Sudden
release of
pressure
Immediate
(acute)
health
hazard
Delayed
(chronic)
health
hazard
Composition/information on ingredients

15. Regulatory information
Australia inventory (AICS)
: Not determined.
China inventory (IECSC)
: Not determined.
Japan inventory
: Not determined.
Korea inventory
: Not determined.
Malaysia Inventory (EHS Register)
: Not determined.
New Zealand Inventory of Chemicals (NZIoC)
: Not determined.
Philippines inventory (PICCS)
: Not determined.
Taiwan inventory (CSNN)
: Not determined.
International regulations
23000 µg/day
(ingestion)
47000 µg/day
(inhalation)
No significant risk
level
Maximum
acceptable dosage
level
Chemical Weapons
Convention List Schedule
I Chemicals
Chemical Weapons
Convention List Schedule
II Chemicals
Chemical Weapons
Convention List Schedule
III Chemicals
Hazardous Material
Information System (U.S.A.)
National Fire Protection
Association (U.S.A.)
MAY CAUSE EYE AND SKIN IRRITATION. CONTAINS MATERIAL THAT MAY
CAUSE TARGET ORGAN DAMAGE, BASED ON ANIMAL DATA. POSSIBLE
CANCER HAZARD - CONTAINS MATERIAL WHICH MAY CAUSE CANCER, BASED
ON ANIMAL DATA.
Caution: HMIS® ratings are based on a 0-4 rating scale, with 0 representing minimal hazards or risks, and 4
representing significant hazards or risks Although HMIS® ratings are not required on MSDSs under 29 CFR 1910.
1200, the preparer may choose to provide them. HMIS® ratings are to be used with a fully implemented HMIS®
program. HMIS® is a registered mark of the National Paint & Coatings Association (NPCA). HMIS® materials may
be purchased exclusively from J. J. Keller (800) 327-6868.
The customer is responsible for determining the PPE code for this material.

To the best of our knowledge, the information contained herein is accurate. However, neither the above-named
supplier, nor any of its subsidiaries, assumes any liability whatsoever for the accuracy or completeness of the
information contained herein.
Final determination of suitability of any material is the sole responsibility of the user. All materials may present
unknown hazards and should be used with caution. Although certain hazards are described herein, we cannot
guarantee that these are the only hazards that exist.
Indicates information that has changed from previously issued version.
Reprinted with permission from NFPA 704-2001, Identification of the Hazards of Materials for Emergency
Response Copyright ©1997, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not
the complete and official position of the National Fire Protection Association, on the referenced subject which is
represented only by the standard in its entirety.
Copyright ©2001, National Fire Protection Association, Quincy, MA 02269. This warning system is intended to be
interpreted and applied only by properly trained individuals to identify fire, health and reactivity hazards of
chemicals. The user is referred to certain limited number of chemicals with recommended classifications in NFPA
49 and NFPA 325, which would be used as a guideline only. Whether the chemicals are classified by NFPA or not,
anyone using the 704 systems to classify chemicals does so at their own risk.