Tankless Water Heater Descaler
Tankless Water Heater Descaler is a specialized, phosphoric acid-based cleaner designed to effectively remove limescale buildup from your tankless water heater. Its fast-acting formula works to quickly restore full efficiency and performance to your unit.
Key Features and Benefits:
- Effective Limescale Removal: Removes stubborn limescale and deposits.
- Phosphoric Acid-Based: Provides powerful cleaning action.
- Restores Efficiency: Quickly returns the unit to its original performance.
- Versatile Sizing: Available in 1-gallon and 8 oz versions for various needs.
Tankless Water Heater Descaler is a reliable and effective tool for maintaining the efficiency and longevity of your water heater. Its powerful formula and targeted action make it a valuable asset for professionals and homeowners alike.
Part Number;
Size
TDS-8OZ 8 oz
TDS-1 1 gallon
SDS
TANKLESS WATER HEATER DESCALER SDS – Download
Identification & Supplier Details
| Product Name (GHS Identifier) |
Tankless Water Heater Descaler |
| Product Number / Brand |
TWHD-1, TWHD-8OZ / Vapco |
| Recommended Use |
Scale cleaner for tankless water heaters |
| Supplier Name / Address |
Vapco Products, Inc. / 401 Marshall Road, Valley Park, Missouri 63088, United States |
| Telephone / Email |
(636) 923-2121 / [email protected] |
| Emergency Phone Number |
(800) 255-3924 |
Hazard Identification & Composition
| GHS Classification (OSHA) |
- Eye damage/irritation, Cat. 1
- Skin corrosion/irritation, Cat. 1B
|
| Signal Word |
Danger |
| Hazard Statement(s) |
- H314: Causes severe skin burns and eye damage
|
| Precautionary Statement (Urgent) |
P310: Immediately call a POISON CENTER/doctor if exposed or concerned. |
Hazardous Components
| Chemical Name |
CAS No. |
Concentration (% weight) |
| Phosphoric acid |
7664-38-2 |
60 – 100 % |
Physical & Chemical Properties
| Physical State / Appearance |
Liquid / Clear liquid |
| Color / Odor |
Colorless / Odorless |
| Boiling Point |
500°F (260°C) |
| pH |
<1 (Concentrate, Highly Acidic) |
| Solubility in Water |
Completely soluble |
| Density and/or Relative Density |
1.584 |
| Vapor Pressure |
0.03 mmHg |
Stability & Reactivity
| Reactivity |
Reacts vigorously with alkaline material or metals. |
| Chemical Stability / Hazardous Reactions |
Stable under normal conditions. No dangerous reaction known under normal use. |
| Conditions to Avoid |
Strong alkaline substances (reacts violently). Do not mix with other chemicals. |
| Incompatible Materials |
Alkaline material, metals, and reducing agents. |
| Hazardous Decomposition Products |
Oxide(s) of phosphorus, hydrogen gas (may be released upon contact with metals). |
Toxicological Information
| Acute Toxicity (Dermal/Oral) |
Dermal LD50 (Rabbit): 2740 mg/kg; Oral LD50 (Rat): 1530 mg/kg (Phosphoric acid) |
| Skin/Eye Damage |
Causes severe skin burns and serious eye damage. Permanent eye damage including blindness could result. |
| Symptoms (Acute) |
Burning pain and severe corrosive skin damage. Stinging, tearing, redness, swelling, and blurred vision. |
| Carcinogenicity / Mutagenicity / Reproductive Toxicity |
Not classified as a carcinogen. No mutagenic/genotoxic or reproductive/developmental effects expected. |
| Chronic Effects |
Prolonged inhalation may be harmful. |
First-Aid Measures
| General Advice |
If you feel unwell, seek medical advice (show the label). Immediately call a POISON CENTER/doctor (P310). |
| If Inhaled |
Remove person to fresh air and keep comfortable for breathing. Get medical advice/attention. |
| In Case of Skin Contact |
Immediately drench affected area with water for at least 15 minutes. Remove contaminated clothing. Obtain medical attention. |
| In Case of Eye Contact |
Immediately rinse cautiously with water for several minutes. Remove contact lenses if present. Continue rinsing. Immediately call a POISON CENTER/doctor (P310). |
| If Swallowed |
Rinse mouth. Do NOT induce vomiting. Obtain medical attention. |
| Note to Physician |
Provide general support measures and treat symptomatically. Symptoms may be delayed. |
Fire-Fighting & Accidental Release Measures
| Suitable Extinguishing Media |
Water spray, fog, carbon dioxide (CO2), alcohol-resistant foam, dry chemical, or sand. Use media appropriate for surrounding fire. |
| Specific Hazards (Fire) |
Gases hazardous to health (oxide(s) of phosphorus, hydrogen gas) may be formed during fire. |
| Firefighting Actions |
Do NOT fight fire when fire reaches containers. Evacuate area. Fight fire remotely due to risk of explosion. Wear NIOSH-approved Self-Contained Breathing Apparatus (SCBA). |
| Personal Precautions (Spill) |
Do not get in eyes, on skin, or on clothing. Do not breathe vapors/mist. Equip cleanup crew with proper PPE. Eliminate ignition sources first. |
| Containment & Cleanup |
Ventilate the area. Contain spills with dikes or absorbents. Take up liquid spill into absorbent material. Transfer spilled material to a suitable container for disposal. |
| Environmental Precautions |
Prevent further leakage or spillage. Do not contaminate water. Avoid discharge into drains, water courses or onto the ground. |
Handling, Storage & PPE
| Precautions for Safe Handling |
Do not handle until all safety precautions are read. Avoid contact with skin, eyes, and clothing. Wash hands thoroughly after handling (P264). |
| Conditions for Safe Storage |
Store in a dry, cool, well-ventilated place. Keep only in the original container. Store locked up (P405). Do not expose to temperatures exceeding 50°C/122°F. |
| Incompatible Materials for Storage |
Alkaline material or metals. |
| Eye/Face Protection (PPE) |
Chemical safety goggles. (Wear eye protection/face protection, P280). |
| Skin/Body Protection (PPE) |
Wear protective gloves (chemical resistant materials) and suitable protective clothing. (Wear protective gloves/clothing, P280). |
| Respiratory Protection (PPE) |
Use a NIOSH-approved Self-Contained Breathing Apparatus (SCBA) whenever exposure may exceed established OELs. |
Transport & Regulatory Information
Transport Information (DOT, IMDG, IATA)
| UN Number |
UN1805 |
| Hazard Class |
8 (Corrosive) |
| Packing Group |
III |
| Proper Shipping Name |
Phosphoric acid solution |
Regulatory Information (U.S. State/Federal)
| Right To Know Components (RTK) |
PHOSPHORIC ACID (CAS: 7664-38-2) listed on Massachusetts, New Jersey, and Pennsylvania RTK lists. |
| US EPA TSCA Inventory |
Phosphoric acid (7664-38-2) is listed. |
Disposal & Ecological Information
| Product Disposal / Waste Treatment |
Must be disposed of as hazardous waste. Dispose of contents/container in accordance with local, regional, national, and international regulations. |
| Sewage Disposal |
Avoid release into the environment. Keep out of sewers and waterways. |
| Ecological Toxicity (Aquatic) |
Expected to produce significant ecotoxicity upon exposure to aquatic organisms due to low pH. |
Disclaimer & Preparation Information
| Prepared By |
Jessica Wilson |
| Date Prepared |
6/25/2025 |
| Disclaimer Summary |
Information is believed accurate but provided without warranty. Final determination of suitability is the sole responsibility of the user. Manufacturer is not responsible for loss, injury, or expense arising from improper use. |
| Key Codes |
N/A = Not applicable; N/D = Not determined |
