Is there a pH range for "neutral" detergents?

There exist many home made pH scales like these


![enter image description here](https://i.stack.imgur.com/S8XTe.jpg) 


![enter image description here](https://i.stack.imgur.com/avn1a.png)


![enter image description here](https://i.stack.imgur.com/WqLjj.png)


But do any of you know if there is an "official" scale that defines if a neutral detergent is 7 sharp or within a range \_\_\_\_\_\_\_?




Neutral detergents are not neccesarily at pH 7, and I know of no legal restriction (at least in the EU) on labelling detergents as neutral based on pH. For example, [this patent](http://www.google.com/patents/EP2596090A1?cl=en) claims protection for a set of neutral detergent formulae with pH of "from about 5.5 to about 8.5".


An example of a commercial product is Proctor and Gamble's "Tide", which has a pH of 8.1-8.5 according to [their safety data.](http://www.pg.com/productsafety/msds/professional_line/professional_line/PG_ProLine_Tide_Professional_Laundry_Detergent.pdf) This is advertised as "100%" neutral ! 


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I want to add some imformation to J.LS answer. According to U.S. General Services Administration, neutral detergents are produced with strong alkalis and weak acids. They are the most common soapless detergent and are usually alkylbenzenesulfonates. So, neutral detergent is not that neutral after all.


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