Note: Ingredients listed on restricted chemical lists
EC/CAS
1310-73-2
Name of the chemical
sodium hydroxide
Concentration
10-20%
EC/CAS
7774-29-0
Name of the chemical
Mercuric iodide
Concentration
<10%
General Information
Version
5
Revision date
2026-07-07
Product name
Nessler Reagent
1.2.1 Relevant identified uses
Laboratory reagent, Determination of ammonium nitrogen
1.2.2. Uses advised against
Consumer use
Emergency telephone
+1(303) 623-5716 - 24
Icons in SDS
Company Information
company name
Hach Company
GHS Information
Signal word
Danger
Hazard Codes
Hazard statements (CLP)
H290, H301, H310, H314, H331, H373, H410
Hazard statements
Code
Statements
H290
May be corrosive to metals
Section 2
SECTION 2: Hazards identification
Classification of the substance or mixture Corrosive to metals Category 1 Acute toxicity - Oral Category 3 Acute toxicity - Dermal Category 2 Acute toxicity - Inhalation (Dusts/Mists) Category 3 Skin corrosion/irritation Category 1 Sub-category A Serious eye damage/eye irritation Category 1 Specific target organ toxicity (repeated exposure) Category 2 Hazardous to the aquatic environment - acute Category 1 Hazardous to the aquatic environment - chronic Category 1 Hazards not otherwise classified (HNOC) Not applicable
Signal word
Danger
Hazard statements
H290 - May be corrosive to metals H301 - Toxic if swallowed H310 - Fatal in contact with skin H314 - Causes severe skin burns and eye damage H331 - Toxic if inhaled H373 - May cause damage to organs through prolonged or repeated exposure H410 - Very toxic to aquatic life with long lasting effects
Precautionary statements
P270 - Do not eat, drink or smoke when using this product P301 + P310 - IF SWALLOWED: Immediately call a POISON CENTER, doctor or physician P405 - Store locked up P501 - Dispose of contents and container in accordance with local, regional, national, and international regulations as applicable P262 - Do not get in eyes, on skin, or on clothing P310 - Immediately call a POISON CENTER, doctor or physician P271 - Use only outdoors or in a well-ventilated area P304 + P340 - IF INHALED: Remove person to fresh air and keep comfortable for breathing P403 + P233 - Store in a well-ventilated place. Keep container tightly closed P280 - Wear protective gloves, protective clothing, eye protection and face protection P301 + P330 + P331 - IF SWALLOWED: Rinse mouth. Do NOT induce vomiting P303 + P361 + P353 - IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower P305 + P351 + P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing P363 - Wash contaminated clothing before reuse P260 - Do not breathe dust, fume, gas, mist, vapors and spray P273 - Avoid release to the environment P391 - Collect spillage P234 - Keep only in original container P390 - Absorb spillage to prevent material damage
Other hazards
Known No information available.
2.1 Classification of the substance or mixture
Corrosive to metals Category 1 Acute toxicity - Oral Category 3 Acute toxicity - Dermal Category 2 Acute toxicity - Inhalation (Dusts/Mists) Category 3 Skin corrosion/irritation Category 1 Sub-category A Serious eye damage/eye irritation Category 1 Specific target organ toxicity (repeated exposure) Category 2 Hazardous to the aquatic environment - acute Category 1 Hazardous to the aquatic environment - chronic Category 1 Hazards not otherwise classified (HNOC) Not applicable.