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There is also some evidence to suggest that exposure to titanium dioxide nanoparticles may be harmful or toxic to the environment, including aquatic life and other organisms. The production and disposal of the mineral may also release pollutants, such as carbon dioxide and sulfur dioxide, into the air and water.

Freshwater algae show low-to-moderate susceptibility to TiO₂ exposure, with more pronounced toxic effects in the presence of UV irradiation. It has also been shown that nano-sized TiO₂ is significantly more toxic to algae Pseudokirchneriella sub-capitata than submicron-sized TiO₂. Hund-Rinke and Simon  reported that UV irradiated 25 nm TiO₂ NPs are more toxic to green freshwater algae Desmodesmus subspicatus than UV irradiated 50 nm particles, which is in agreement with Hartmann et al. UV irradiated TiO₂ NPs also inactivated other algae species such as Anabaena, Microcystis, Melsoira and Chroococcus. It was demonstrated that smaller particles have a greater potential to penetrate the cell interior than submicron-sized particles and larger aggregates. Studies have shown that the amount of TiO₂ adsorbed on algal cells can be up to 2.3 times their own weight.

Other experts say there is simply no conclusive evidence at this point that titanium dioxide is damaging to humans after ingesting. Kaminski in particular said the research studies cite health hazards that were found by using high doses of the product, which you would not normally see in food.

Food recalls:Some Jif peanut butter products recalled over salmonella outbreak concerns 

However, since it’s photosensitive — meaning it can stimulate free radical production — it’s usually coated in silica or alumina to prevent potential cell damage without reducing its UV-protective properties (7Trusted Source).

Inventory: Low inventory of mainstream producers, it is expected that the overall size of spot inventory today is low, and there is less stock in mainstream factories.2. Mentality: the buyer has to prepare goods in advance, and the new order price is slightly less willing to purchase in bulk; Because the seller's inventory is small, the manufacturer has no willingness to reduce the price of sales, and the demand for new orders in the market is relatively large.Trend: The load of titanium dioxide enterprises is stable, the willingness to ship at low prices is not strong, and the downstream buyers still have inventory digestion, and the intention to supplement orders in the short term is limited. It is expected that the market price of titanium dioxide is stable today, and the market trading atmosphere is more general.
According to the feedback of manufacturers, the new orders of mainstream factories maintain stable prices, and the overall new volume of the market is limited. On the demand side, the terminal basically had batch replenishment last month, and the purchase intention of new orders was low; On the supply side, mainstream manufacturers normally produce and deliver goods, and the actual output of the industry is stable. Most factories quote a new price of 17,000 yuan/ton or more market negotiation range reference 16000-17200 yuan/ton, plastics and papermaking related downstream feedback part of the tight model price is higher. Recent titanium dioxide raw materials are expected to weaken, titanium dioxide price support is relatively limited, comprehensive market factors, the current titanium dioxide market many buyers hold a wait-and-see mentality.

Titanium dioxide is used in an enormous range of food products, which can feel jarring when looking at some of its other uses.