MATERIAL SAFETY DATA SHEET
MSDS 0253

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          Section 1 -- PRODUCT AND COMPANY IDENTIFICATION                      
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                                                           HMIS CODES
PRODUCT NAME                                            Health            2
   SludgeMaster Plus                                    Flammability      2
                                                        Reactivity        0
PRODUCT CODES                                           PPI               B
   68452, 68454, 68456
CHEMICAL FAMILY:
   Organic
USE
   Fuel Oil Treatment
MANUFACTURER'S NAME                          EMERGENCY TELEPHONE NO.
   The RectorSeal Corporation                 Chemtrec 24 Hours
   2601 Spenwick Drive                        (800) 424-9300 
   Houston, Texas  77055  USA                         
DATE OF PREPARATION                          TECHNICAL SERVICE TELEPHONE NO. 
   September 18, 2002                         (800) 231-3345
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          Section 2 -- COMPOSITION/INFORMATION ON INGREDIENTS
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% by WT        CAS No.  INGREDIENT             UNITS          
  17.67     64742-47-8  Mineral Spirits 
                             ACGIH TLV    300  ppm                 
                             OSHA  PEL    300  ppm  
                             OSHA STEL    400  ppm               
  78.41      4742-94-5  Solvent Naphtha 
                             ACGIH TLV    N/D                    
                             OSHA  PEL    N/D 
   1.96       111-76-2	Glycol Butyl Ether	
                             ACGIH TLV     25  ppm                   
                             OSHA  PEL     25  ppm                   
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          Section 3 -- HAZARDS IDENTIFICATION
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SUMMARY OF ACUTE HAZARDS
   Overexposure may cause coughing, shortness of breath, dizziness, central 
nervous system depression, intoxication and collapse.  It may cause irritation
to the respiratory tract and to other mucous membranes.
ROUTE OF EXPOSURE, SIGNS AND SYMPTOMS
INHALATION
   Upper respiratory tract irritation and narcosis, CNS symptoms.
EYE CONTACT
   Irritation, blurred vision.	
SKIN CONTACT
   Irritation, dermatitis, defatting.
INGESTION
   Gastro-intestinal irritation, nausea, vomiting, diarrhea, aspiration into
lungs can cause chemical pneumonitis.
SUMMARY OF CHRONIC HAZARDS
   Repeated inhalation may cause dizziness, nausea and CNS effects.  Prolonged 
skin contact may result in irritation and absorption.
MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE
  Individuals with pre-existing or chronic diseases of the eyes, skin,
respiratory system, cardiovascular system, gastrointestinal system, liver, 
or kidneys may have increased susceptibility to excessive exposure.
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          Section 4 -- FIRST AID MEASURES
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   If INHALED:     If overcome by exposure, remove victim to fresh air 
                   immediately.  Give oxygen or artificial respiration as
                   needed.  Obtain emergency medical attention.  Prompt  
                   action is essential.
   If on SKIN:     Immediately flush with large amounts of water; use soap 
                   if available.  Remove contaminated clothing.
   If in EYES:     Immediately flush with large amounts of water for at least 
                   15 minutes.  Get prompt medical attention.
   If SWALLOWED:   If swallowed, DO NOT induce vomiting.  Keep at rest. Get 
                   prompt medical attention.
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          Section 5 -- FIRE FIGHTING MEASURES
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FLASH POINT                         LEL      UEL
   127 F (52 C) SETA CC             N/D      N/D
EXTINGUSING MEDIA
   Foam, dry chemical, carbon dioxide or water fog.
SPECIAL FIRE FIGHTING PROCEDURES:  Wear self-contained breathing apparatus 
   (SCBA) and other protective clothing.  Hazardous decomposition products 
   possible (see Section 10).
UNUSUAL FIRE AND EXPLOSION HAZARDS:  None known.
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          Section 6 -- ACCIDENTAL RELEASE MEASURES
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STEPS TO BE TAKEN IN CASE MATERIAL IS RELEASED OR SPILLED:  Remove all 
   sources of ignition.  Use absorbent materials to prevent footing hazard 
   and to contain.  Ventilate area with natural or explosion-proof, forced 
   air ventilation.  Avoid flushing into sewers, drains, waterways, and soil. 
   Wear protective clothing and respiratory protection during cleanup.  
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          Section 7 -- HANDLING AND STORAGE
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PRECAUTIONS TO BE TAKEN IN HANDLING AND STORING:  Keep away from heat, sparks 
   and open flames.  
OTHER PRECAUTIONS:  Avoid prolonged or repeated contact with skin or 
   clothing.  Empty containers may contain residues and vapors; treat as if 
   full and observe all products precautions.  Do not reuse empty containers.
   KEEP OUT OF REACH OF CHILDREN.
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          Section 8 -- EXPOSURE CONTROLS/PERSONAL PROTECTION
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RESPIRATORY PROTECTION (SPECIFY TYPE):  In confined poorly ventilated areas,
   use NIOSH/MSHA approved air purifying or supplied air purifying or 
   supplied air respirators.
VENTILATION - LOCAL EXHAUST:  Acceptable 
SPECIAL:  Explosion-proof equipment.
MECHANICAL (GENERAL):  Preferable
OTHER:  N/A
PROTECTIVE GLOVES:  Wear rubber gloves.
EYE PROTECTION:  Chemical splash goggles (ANSI Z-87.1 or equivalent)
OTHER PROTECTIVE CLOTHING OR EQUIPMENT:  Coveralls recommended.
WORK/HYGIENIC PRACTICES:  Where use can result in skin contact, wash exposed
   areas thoroughly before eating, drinking, smoking, or leaving work area. 
   Launder contaminated clothing before reuse.
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          Section 9 -- PHYSICAL AND CHEMICAL PROPERTIES
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BOILING POINT:                         300-500 F @ 760mm Hg 
SPECIFIC GRAVITY (H20 = 1):            0.96
VAPOR PRESSURE (mm Hg):                N/D
MELTING POINT:                         N/A
VAPOR DENSITY (AIR = 1):               2.5
EVAPORATION RATE (ETHYL ACETATE = 1):  <1
APPEARANCE/ODOR:                       Oily Amber Liquid / Petroleum Odor     
SOLUBILITY IN WATER:                   Slightly Soluble 
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          Section 10 -- STABILITY AND REACTIVITY 
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STABILITY:  Stable
CONDITIONS TO AVOID:  Heat, sparks, open flames.
INCOMPATIBILITY (MATERIALS TO AVOID):  Oxidizers, acids and bases.
HAZARDOUS DECOMPOSITION PRODUCTS:  CO, CO2, fragmented hydrocarbons.
HAZARDOUS POLYMERIZATION:  Will not occur.
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          Section 11 -- TOXICOLOGY INFORMATION
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TOXICOLOGY DATA 
Ingredient Name
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   Mineral Spirits 
                  Intravenous-Mouse LD50:40 mg/kg 
                  Inhalation-Rat LC50:3400 ppm/4H 
   Solvent Naphtha 
                  Oral-Rat LD50:N/D
                  Inhalation-Rat LC50:N/D 
   Glycol Butyl Ether 
                  Oral-Rat LD50:470 mg/kg 
                  Inhalation-Rat LC50:2900 mg/m3
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          Section 12 -- Ecological Information
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ECOLOGICAL DATA 
Ingredient Name
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   Mineral Spirits 
                  Food Chain Concentration Potential: N/D
                  WATERFOWL TOXICITY: N/D
                  BOD: 8%, 5 days 
                  AQUATIC TOXICITY: N/D
   Solvent Naphtha 
                  Food Chain Concentration Potential: N/D
                  WATERFOWL TOXICITY: N/D
                  BOD: N/D
                  AQUATIC TOXICITY: N/D
   Glycol Butyl Ether 
                  Food Chain Concentration Potential: N/D
                  WATERFOWL TOXICITY: N/D
                  BOD: 26% 5 Day 
                  AQUATIC TOXICITY: 1000 ppm/24 hr/brine shrimp/TLm 
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          Section 13 -- DISPOSAL CONSIDERATIONS
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Waste Classification:  D001, RCRA classified hazardous waste.  Dispose of
absorbed materials and liquid waste in approved, controlled incineration
facility    in accordance with all local, state and federal regulations.
Disposal Method:  Incineration
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          Section 14 -- TRANSPORTATION INFORMATION
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DOT:  Flammable liquid, n.o.s. (Mineral Spirits & Naptha), Class 3, UN1993, 
        PGIII, ERG#128   Quarts and less:  Consumer Commodity, ORM-D 
OCEAN (IMDG):  Flammable liquid, n.o.s. (Mineral Spirits & Naptha), Class 3, 
                 UN1993, PGIII, IMDG#3345, EmS#3-02
AIR (IATA):  Flammable liquid, n.o.s. (Mineral Spirits & Naptha), Class 3, 
               UN1993,PGIII, ERG#128   
WHMIS (CANADA):  Class B-2
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          Section 15 -- REGULATORY INFORMATION
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REGULATORY DATA
Ingredient Name
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  Mineral Spirits 
                  SARA 313           No
                  TSCA Inventory    Yes
                  CERCLA RQ         N/A
                  RCRA Code         N/A
  Solvent Naphtha 
                  SARA 313           No
                  TSCA Inventory    Yes
                  CERCLA RQ         N/A
                  RCRA Code         N/A 
  Glycol Butyl Ether 
                  SARA 313          Yes
                  TSCA Inventory    Yes
                  CERCLA RQ         N/A
                  RCRA Code         N/A 
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          Section 16 -- OTHER INFORMATION
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   This document is prepared pursuant to the OSHA Hazard Communication 
Standard (29 CFR 1910.1200).  The information herein is given in good faith,
but no warranty, expressed or implied is made.  Consult RectorSeal for further
information:  (713) 263-8001