Is Strontium Aluminate Based Glow In The Powder Safe and Non Toxic?

One question people usually have about glow in the dark powder is that is it really safe to use? In the past, this glow green color (the most commonly used and known color for glow in the dark powder) is usually related to uranium, which as we all know, is very radioactive and deadly. The short answer to this question is, yes, glow in the dark powder is 100% safe, non-toxic and non-radioactive. The long answer to this question, well, we will first need to take a look at the composition of the glow in the dark powder and what makes it to have its glow color.

There are many types of glow in the dark powder sold and used in the market, strontium aluminate based glow pigment being the most popular one because of its long glow time and high glow intensity. Because we do not want to make this article too long and boring, we will mainly talk about strontium aluminate based glow pigment. Rest assured, the other types glow pigment are also safe to use.


Strontium Aluminate Before Crushing And Sieviting

Right now, there are two types of strontium aluminate based glow in the dark powder that can be massively produced and used: SrAl2O4:Eu, Dy, emitting a yellow-green light (MHG series) and Sr4Al14O25:Eu, Dy (MHB seires), emitting a blue-green light. These two glow pigment is made by firing SrCO3, Dy2O3, Eu2O3, Al2O3 and flux. After firing, then the material is crushed and sieved to make glow in the dark powder with all kinds of grain size, glow time and luminosity. SrCO3, Dy2O3, Al2O3 is the oxide form of strontium, dysprosium and aluminium respectively. Strontium and dysprosium are types of rare-earth metals, and is non-toxic and non-radioactive.

The glow in the dark phenomenon of strontium aluminate glow pigment is caused by electronic transaction. To put it simply, when the pigment is excited by light, it will “catch” and store the electronics. When it turns dark, these stored electronics will be slowly released by thermal disturbance of the room temperature. The released electronics will again transact into excited status, when these electronics return to ground state, then the pigment will produce the afterglow.

Blue-green Strontium Aluminate Based Glow Pigment

Glow In The Dark Color of Blue-green Strontium Aluminate Powder

If you are still doubting, our strontium aluminate based glow in the dark powder are certificated by REACH, and passed the testing standard of ASTM and Rohs, which test for harmful items like lead and heavy metal. So they are completely safe to use and make your desired glow in the dark products. If you are interested and want to see our test reports, please contact our specialist at or by clicking the Contact Us button. 

Post time: Aug-30-2022

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