© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Common Name: Hydroxylamine sulfate
Chemical Formula: (NH2OH)2·H2SO4
CAS Number: 10039-54-0
Physical Appearance: Typically looks like a white crystalline solid. There’s a mild but noticeable ammonia-like smell from solid hydroxylamine sulfate. This basic info seems boring until you're standing in a storeroom, staring at fifteen different white powders — that’s when a clear ID keeps you from picking what could hurt you.
Hazards: Skin and eye irritant, risk of methemoglobinemia if absorbed or inhaled.
GHS Labels: Serious eye damage, acute toxicity, skin sensitization.
Health Risks: Breathing in the dust or touching the solution can cause discomfort or worse — tightness in the chest, shortness of breath, headaches, and sometimes symptoms that mimic anemia. A chemical like this doesn’t just give a slight sting: it can interfere with the blood’s ability to carry oxygen. I once read a report where a careless clean-up led to instant headaches and nausea, showing just how quickly things can go sideways.
Main Component: Hydroxylamine sulfate (~98-100%)
Impurities: Sometimes trace amounts of ammonia, sulfuric acid
Molecular Weight: 164.14 g/mol
Keeping these numbers handy means you know exactly what’s being handled, not just what’s written on the jug. Some recipes add stabilizers or anti-caking agents, but high-purity chemical work relies on knowing every ingredient listed.
Inhalation: Move the person to fresh air. Seek help if dizziness, coughing, or difficulty with breathing doesn’t go away.
Skin Contact: Wash skin with running water and soap. Remove contaminated clothing, boots, gloves.
Eye Contact: Flush immediately, keep lids apart, rinse gently for at least fifteen minutes. Don’t just dab and hope; eyes need serious rinsing to dodge damage.
Ingestion: Don’t encourage vomiting. Rinse mouth, drink water only when directed by medical staff.
Having plans written out gives workers, students, and even curious visitors a fighting chance if something goes wrong, because confusion in an emergency just adds to the risk.
Extinguishing Media: Water spray, CO2, dry chemical, alcohol-resistant foam.
Hazards from Combustion: Nitrogen oxides, sulfur oxides, and possible toxic fumes.
Protective Gear: Full firefighting turnout gear and self-contained breathing apparatus.
Special Notes: Hydroxylamine sulfate itself isn’t flammable, but it can speed the burning of other materials. In my experience, any chemical storeroom investing in fire extinguishers and sprinklers does so because one shortcut in labeling or handling means a minor spill can ignite a whole new set of problems.
Personal Precautions: Wear gloves, protection for your eyes and face, and a dust mask if there’s a cloud of powder.
Environmental Precautions: Prevent runoff into sewers, drains, and the natural environment.
Cleanup Methods: Sweep up gently to avoid stirring dust. Use wet cleaning to keep particles from flying around. Avoid vacuuming with regular equipment, since a spark could set things off.
Every cleanup isn’t just about product loss. It’s about not letting a spill turn into a health risk for workers or a costly pollution event for the neighborhood stream or river nearby.
Handling: Work in a space with good airflow. Keep all containers tightly sealed when not in use. Handle with care, using appropriate PPE — real gloves and goggles, not just wishful thinking.
Storage: Store in cool, dry, and well-ventilated places. Avoid mixing this chemical with oxidizers, reducing agents, or any potential acids or bases that can trigger unwanted reactions.
Experience shows that many accidents start with poor storage or careless container stacking. The safest places regularly check container seals, keep incompatible chemicals apart, and build routines where no one just “eyeballs it.”
Workplace Limits: OSHA and ACGIH have occupational limits for hydroxylamine compounds.
Ventilation: Local exhaust setup cuts down build-up of dust or vapors.
Personal Protection: Chemical-resistant gloves, long-sleeved clothing, safety glasses, splash shields, dust masks or better.
Hygiene: Don’t eat, drink, or smoke anywhere near the chemical. Even after you’re done, good old scrubbing makes a difference, since skin contact sometimes goes unnoticed until rashes or hives appear.
Appearance: White, sometimes slightly off-white, powder.
Odor: Mild ammonia-like.
Melting Point: Decomposes before true melting.
Solubility: Readily dissolves in water.
Other Physical Traits: Doesn’t burn but can explode under the right conditions.
If you’ve ever seen what an unexpected chemical reaction can do in a lab or on a loading dock, you’ll appreciate why these data sheets matter more than just for regulatory compliance.
Stability: Stable in dry, cool places. Easily breaks down in heat or when mixed with metals or strong oxidizers.
Reactivity: Mixing with acids can create dangerous gases; exposure to base releases ammonia fumes. Metal contact — especially with copper, zinc, or their alloys — may cause decomposition.
Decomposition Products: Nitrogen oxides, sulfur oxides, ammonia, possible explosives.
The key lesson here: know your storage neighbors and always check for spills. Even a routine container swap can become the day everyone remembers if these basics are ignored.
Acute Effects: Irritation of eyes, skin, and airways. Short exposures in closed rooms have caused headaches, nausea, difficulty breathing.
Chronic Effects: Repeated or high-level exposure can cause methemoglobinemia, which cuts off oxygen to tissues and organs. Also possible: eczema, asthma-like symptoms, skin sensitization, and central nervous system issues.
Kids, pregnant workers, and folks with asthma or blood disorders face bigger risks. Even when PPE is used, accidents come from overconfidence. There’s a story for every old-timer who thought, “I’ll just pour this quickly and be done,” only to miss work for a week recuperating.
Aquatic Impact: Highly toxic to aquatic life. Leaks and spills can devastate fish and invertebrate populations downstream.
Persistence: Doesn’t linger long in the environment; breaks down in water under sunlight or with microbial action.
Bioaccumulation: Unlikely to build up in animals, but still poses a real short-term threat to aquatic habitats if dumped or mishandled.
Regulators don’t just set these requirements for fun. Environmental protection comes from recognizing how quickly a fine powder or small spill becomes everybody’s problem when water sources are nearby.
Waste Handling: Treat wastes as hazardous. Collect and label waste; don’t just toss it in the regular trash or pour it down the sink.
Incineration: Suitable for destruction by trained professionals and not general lab staff.
Spill Disposal: Clean up with wet methods; collect in sealed containers meant for hazardous waste collection. Follow local regulations on disposal strictly, not just for fines but so that the clean-up crew isn’t endangered.
UN Number: UN2865
Transport Hazard Class: Class 8: Corrosive materials.
Packing Group: III
Shipping Notes: Mark and seal containers clearly. Avoid transporting with incompatible or flammable goods. Regulations change across borders; reading up before shipping never hurts, since losing cargo to a paperwork slipup or a hazardous spill could be a nightmare for any business and its local environment.
Chemical Inventories: Listed under inventories like TSCA (US), EINECS (EU), and similar in other regions.
Worker Protection: Covered by hazard communication standards; employers train for chemical risks, personal protective equipment, and spill management.
Community Right-to-Know: Reporting requirements when stored or used in large amounts.
Strict rules don’t just fill up the back pages of a safety binder — they’re hard-won lessons from years of accidents and near-misses. The safest operations bake these rules into every day’s work, not just annual safety drills.
