Phosphoric acid 25%

Hazard statements (CLP)

H290, H314

Code

Statements

H290

May be corrosive to metals

2.1 Classification of the substance or mixture

Regulation (EC) No Met Corr. 1 H290 May be corrosive to metals 1272/2008/EC: Skin Corr. 1B - H314 Causes severe skin burns and eye damage Directive 67/548/EMÜ C Corrosive R34 Causes burns

2.2 Label elements

Regulation (EC) No Phosphoric acid ... %; 1272/2008/EÜ: Cas 7664-38-2 EC 231-633-2 Danger! H290 May be corrosive to metals H314 Causes severe skin burns and eye damage P260 Do not breathe dust/fume/gas/mist/vapours/spray. P280 Wear protective gloves/protective clothing/eye protection/face protection P303 + P361 + P353 If on skin (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. P310 Immediately call a POISON CENTER or doctor/physician. P305 + P351 + P338 If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P406 Store in a corrosive resistant/… container with a resistant inner liner.

Potential health effects

Phosphoric acid is classified as a corrosive substance which causes burns. Phosphoric acid causes tissue damage through direct chemical action. Tissue proteins are turned into acid albuminates that can dissolve in concentrated acid. Heamonoglobin is precipitated. As a strong irritant it causes loss of tension in the nervous system. Ingestion (swallowing) - phosphoric acid often eats away oesophagus and stomach walls. The contact area is coloured brown or black. Precipitated blood looking like coffee grounds can be often found in stomach. Oesophagus epithelium can be partially or completely exfoliated. Eye contact - phosphoric acid can cause cornea exposure and in more serious cases oedema and necrosis of deeper located tissues. Skin contact - phosphoric acid causes burns that usually penetrate the complete depth of the skin; the wound heal slowly with scaring and inflammations. Vapour inhalation - causes pulmonary oedema. Accompanying physical symptoms are most often wheezing, low blood pressure and quickened pulse. Haemoptysis and dyspnoea can persist for a few weeks after a single exposure to acid vapours. Vapours can cause damage to tooth enamel. Chemical hazards Phosphoric acid is a medium acid. At room temperature it is lasting and chemically low-active; does not oxidise, tends to condense strongly (polyphosphoric acids are created by dehydration). It is resistant to strong reducing agents at room temperature or even at the temperature of up to about 350 - 400°C, at the temperature of over 400°C it is easily reduced. At higher temperatures the phosphoric acid is highly reactive with the majority of metals and their oxides, and it affects even such resistant oxides as silica. Boiling phosphoric acid is highly corrosive for the majority of practically applied metals and alloys, as well as for ceramics which acid resistance decreases as the temperature and concentration grow. Concentrated and hot H3PO4 reacts with porcelain and platinum.

Environmental effects

After entering the environment, phosphoric acid causes strong soil and water acidification and is toxic for plants and animals. Criteria for PBT or vPvB in accordance with Annex XIII of the REACH Regulation do not apply to inorganic substances. Phosphoric acid is not identified as a PBT and vPvB substance.